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- /* $Id: teximage.c,v 3.12 1998/09/18 02:32:40 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.0
- * Copyright (C) 1995-1998 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
- /*
- * $Log: teximage.c,v $
- * Revision 3.12 1998/09/18 02:32:40 brianp
- * fixed proxy texture internal format bug reported by Sam Jordon
- *
- * Revision 3.11 1998/07/18 03:35:01 brianp
- * fixed a few error reporting mistakes
- *
- * Revision 3.10 1998/07/17 03:25:17 brianp
- * implemented glGetTexImage()
- *
- * Revision 3.9 1998/05/05 00:28:52 brianp
- * GL_ABGR_EXT pixel format now works with glTexImageXD()
- *
- * Revision 3.8 1998/05/05 00:19:47 brianp
- * added GL_COLOR_INDEX to cases in components_in_intformat
- *
- * Revision 3.7 1998/04/20 21:46:08 brianp
- * added David's second glCopyTexSubImage() patch
- *
- * Revision 3.6 1998/04/13 23:16:57 brianp
- * fixed 3Dfx glCopyTexSubImage() bug (David Bucciarelli)
- *
- * Revision 3.5 1998/03/27 04:17:31 brianp
- * fixed G++ warnings
- *
- * Revision 3.4 1998/03/03 02:42:38 brianp
- * removed a few unneeded assertions
- *
- * Revision 3.3 1998/02/20 04:53:37 brianp
- * implemented GL_SGIS_multitexture
- *
- * Revision 3.2 1998/02/07 14:42:29 brianp
- * NULL proxy image given to glTexImageXD() caused crash (Wes Bethel)
- *
- * Revision 3.1 1998/02/01 22:28:41 brianp
- * removed an unneeded header
- *
- * Revision 3.0 1998/01/31 21:04:38 brianp
- * initial rev
- *
- */
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #include <assert.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "context.h"
- #include "image.h"
- #include "macros.h"
- #include "span.h"
- #include "teximage.h"
- #include "types.h"
- #endif
-
-
- /*
- * NOTES:
- *
- * The internal texture storage convension is an array of N GLubytes
- * where N = width * height * components. There is no padding.
- */
-
-
-
-
- /*
- * Compute log base 2 of n.
- * If n isn't an exact power of two return -1.
- * If n<0 return -1.
- */
- static int logbase2( int n )
- {
- GLint i = 1;
- GLint log2 = 0;
-
- if (n<0) {
- return -1;
- }
-
- while ( n > i ) {
- i *= 2;
- log2++;
- }
- if (i != n) {
- return -1;
- }
- else {
- return log2;
- }
- }
-
-
-
- /*
- * Given an internal texture format enum or 1, 2, 3, 4 return the
- * corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
- * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return -1 if
- * invalid enum.
- */
- static GLint decode_internal_format( GLint format )
- {
- switch (format) {
- case GL_ALPHA:
- case GL_ALPHA4:
- case GL_ALPHA8:
- case GL_ALPHA12:
- case GL_ALPHA16:
- return GL_ALPHA;
- case 1:
- case GL_LUMINANCE:
- case GL_LUMINANCE4:
- case GL_LUMINANCE8:
- case GL_LUMINANCE12:
- case GL_LUMINANCE16:
- return GL_LUMINANCE;
- case 2:
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE4_ALPHA4:
- case GL_LUMINANCE6_ALPHA2:
- case GL_LUMINANCE8_ALPHA8:
- case GL_LUMINANCE12_ALPHA4:
- case GL_LUMINANCE12_ALPHA12:
- case GL_LUMINANCE16_ALPHA16:
- return GL_LUMINANCE_ALPHA;
- case GL_INTENSITY:
- case GL_INTENSITY4:
- case GL_INTENSITY8:
- case GL_INTENSITY12:
- case GL_INTENSITY16:
- return GL_INTENSITY;
- case 3:
- case GL_RGB:
- case GL_R3_G3_B2:
- case GL_RGB4:
- case GL_RGB5:
- case GL_RGB8:
- case GL_RGB10:
- case GL_RGB12:
- case GL_RGB16:
- return GL_RGB;
- case 4:
- case GL_RGBA:
- case GL_RGBA2:
- case GL_RGBA4:
- case GL_RGB5_A1:
- case GL_RGBA8:
- case GL_RGB10_A2:
- case GL_RGBA12:
- case GL_RGBA16:
- return GL_RGBA;
- case GL_COLOR_INDEX1_EXT:
- case GL_COLOR_INDEX2_EXT:
- case GL_COLOR_INDEX4_EXT:
- case GL_COLOR_INDEX8_EXT:
- case GL_COLOR_INDEX12_EXT:
- case GL_COLOR_INDEX16_EXT:
- return GL_COLOR_INDEX;
- default:
- return -1; /* error */
- }
- }
-
-
-
- /*
- * Given an internal texture format enum or 1, 2, 3, 4 return the
- * corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
- * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return the
- * number of components for the format. Return -1 if invalid enum.
- */
- static GLint components_in_intformat( GLint format )
- {
- switch (format) {
- case GL_ALPHA:
- case GL_ALPHA4:
- case GL_ALPHA8:
- case GL_ALPHA12:
- case GL_ALPHA16:
- return 1;
- case 1:
- case GL_LUMINANCE:
- case GL_LUMINANCE4:
- case GL_LUMINANCE8:
- case GL_LUMINANCE12:
- case GL_LUMINANCE16:
- return 1;
- case 2:
- case GL_LUMINANCE_ALPHA:
- case GL_LUMINANCE4_ALPHA4:
- case GL_LUMINANCE6_ALPHA2:
- case GL_LUMINANCE8_ALPHA8:
- case GL_LUMINANCE12_ALPHA4:
- case GL_LUMINANCE12_ALPHA12:
- case GL_LUMINANCE16_ALPHA16:
- return 2;
- case GL_INTENSITY:
- case GL_INTENSITY4:
- case GL_INTENSITY8:
- case GL_INTENSITY12:
- case GL_INTENSITY16:
- return 1;
- case 3:
- case GL_RGB:
- case GL_R3_G3_B2:
- case GL_RGB4:
- case GL_RGB5:
- case GL_RGB8:
- case GL_RGB10:
- case GL_RGB12:
- case GL_RGB16:
- return 3;
- case 4:
- case GL_RGBA:
- case GL_RGBA2:
- case GL_RGBA4:
- case GL_RGB5_A1:
- case GL_RGBA8:
- case GL_RGB10_A2:
- case GL_RGBA12:
- case GL_RGBA16:
- return 4;
- case GL_COLOR_INDEX:
- case GL_COLOR_INDEX1_EXT:
- case GL_COLOR_INDEX2_EXT:
- case GL_COLOR_INDEX4_EXT:
- case GL_COLOR_INDEX8_EXT:
- case GL_COLOR_INDEX12_EXT:
- case GL_COLOR_INDEX16_EXT:
- return 1;
- default:
- return -1; /* error */
- }
- }
-
-
-
- struct gl_texture_image *gl_alloc_texture_image( void )
- {
- return (struct gl_texture_image *) calloc( 1, sizeof(struct gl_texture_image) );
- }
-
-
-
- void gl_free_texture_image( struct gl_texture_image *teximage )
- {
- if (teximage->Data) {
- free( teximage->Data );
- }
- free( teximage );
- }
-
-
-
- /*
- * Given a gl_image, apply the pixel transfer scale, bias, and mapping
- * to produce a gl_texture_image. Convert image data to GLubytes.
- * Input: image - the incoming gl_image
- * internalFormat - desired format of resultant texture
- * border - texture border width (0 or 1)
- * Return: pointer to a gl_texture_image or NULL if an error occurs.
- */
- static struct gl_texture_image *
- image_to_texture( GLcontext *ctx, const struct gl_image *image,
- GLint internalFormat, GLint border )
- {
- GLint components;
- struct gl_texture_image *texImage;
- GLint numPixels, pixel;
- GLboolean scaleOrBias;
-
- assert(image);
- assert(image->Width>0);
- assert(image->Height>0);
- assert(image->Depth>0);
-
- /* internalFormat = decode_internal_format(internalFormat);*/
- components = components_in_intformat(internalFormat);
- numPixels = image->Width * image->Height * image->Depth;
-
- texImage = gl_alloc_texture_image();
- if (!texImage)
- return NULL;
-
- texImage->Format = (GLenum) decode_internal_format(internalFormat);
- texImage->IntFormat = (GLenum) internalFormat;
- texImage->Border = border;
- texImage->Width = image->Width;
- texImage->Height = image->Height;
- texImage->Depth = image->Depth;
- texImage->WidthLog2 = logbase2(image->Width - 2*border);
- if (image->Height==1) /* 1-D texture */
- texImage->HeightLog2 = 0;
- else
- texImage->HeightLog2 = logbase2(image->Height - 2*border);
- if (image->Depth==1) /* 2-D texture */
- texImage->DepthLog2 = 0;
- else
- texImage->DepthLog2 = logbase2(image->Depth - 2*border);
- texImage->Width2 = 1 << texImage->WidthLog2;
- texImage->Height2 = 1 << texImage->HeightLog2;
- texImage->Depth2 = 1 << texImage->DepthLog2;
- texImage->MaxLog2 = MAX2( texImage->WidthLog2, texImage->HeightLog2 );
- texImage->Data = (GLubyte *) malloc( numPixels * components );
-
- if (!texImage->Data) {
- /* out of memory */
- gl_free_texture_image( texImage );
- return NULL;
- }
-
- /* Determine if scaling and/or biasing is needed */
- if (ctx->Pixel.RedScale!=1.0F || ctx->Pixel.RedBias!=0.0F ||
- ctx->Pixel.GreenScale!=1.0F || ctx->Pixel.GreenBias!=0.0F ||
- ctx->Pixel.BlueScale!=1.0F || ctx->Pixel.BlueBias!=0.0F ||
- ctx->Pixel.AlphaScale!=1.0F || ctx->Pixel.AlphaBias!=0.0F) {
- scaleOrBias = GL_TRUE;
- }
- else {
- scaleOrBias = GL_FALSE;
- }
-
- switch (image->Type) {
- case GL_BITMAP:
- {
- GLint shift = ctx->Pixel.IndexShift;
- GLint offset = ctx->Pixel.IndexOffset;
- /* MapIto[RGBA]Size must be powers of two */
- GLint rMask = ctx->Pixel.MapItoRsize-1;
- GLint gMask = ctx->Pixel.MapItoGsize-1;
- GLint bMask = ctx->Pixel.MapItoBsize-1;
- GLint aMask = ctx->Pixel.MapItoAsize-1;
- GLint i, j;
- GLubyte *srcPtr = (GLubyte *) image->Data;
-
- assert( image->Format==GL_COLOR_INDEX );
-
- for (j=0; j<image->Height; j++) {
- GLubyte bitMask = 128;
- for (i=0; i<image->Width; i++) {
- GLint index;
- GLubyte red, green, blue, alpha;
-
- /* Fetch image color index */
- index = (*srcPtr & bitMask) ? 1 : 0;
- bitMask = bitMask >> 1;
- if (bitMask==0) {
- bitMask = 128;
- srcPtr++;
- }
- /* apply index shift and offset */
- if (shift>=0) {
- index = (index << shift) + offset;
- }
- else {
- index = (index >> -shift) + offset;
- }
- /* convert index to RGBA */
- red = (GLint) (ctx->Pixel.MapItoR[index & rMask] * 255.0F);
- green = (GLint) (ctx->Pixel.MapItoG[index & gMask] * 255.0F);
- blue = (GLint) (ctx->Pixel.MapItoB[index & bMask] * 255.0F);
- alpha = (GLint) (ctx->Pixel.MapItoA[index & aMask] * 255.0F);
-
- /* store texel (components are GLubytes in [0,255]) */
- pixel = j * image->Width + i;
- switch (texImage->Format) {
- case GL_ALPHA:
- texImage->Data[pixel] = alpha;
- break;
- case GL_LUMINANCE:
- texImage->Data[pixel] = red;
- break;
- case GL_LUMINANCE_ALPHA:
- texImage->Data[pixel*2+0] = red;
- texImage->Data[pixel*2+1] = alpha;
- break;
- case GL_INTENSITY:
- texImage->Data[pixel] = red;
- break;
- case GL_RGB:
- texImage->Data[pixel*3+0] = red;
- texImage->Data[pixel*3+1] = green;
- texImage->Data[pixel*3+2] = blue;
- break;
- case GL_RGBA:
- texImage->Data[pixel*4+0] = red;
- texImage->Data[pixel*4+1] = green;
- texImage->Data[pixel*4+2] = blue;
- texImage->Data[pixel*4+3] = alpha;
- break;
- default:
- gl_problem(ctx,"Bad format in image_to_texture");
- return NULL;
- }
- }
- if (bitMask!=128) {
- srcPtr++;
- }
- }
- }
- break;
-
- case GL_UNSIGNED_BYTE:
- for (pixel=0; pixel<numPixels; pixel++) {
- GLubyte red, green, blue, alpha;
- switch (image->Format) {
- case GL_COLOR_INDEX:
- if (decode_internal_format(internalFormat)==GL_COLOR_INDEX) {
- /* a paletted texture */
- GLint index = ((GLubyte*)image->Data)[pixel];
- red = index;
- }
- else {
- /* convert color index to RGBA */
- GLint index = ((GLubyte*)image->Data)[pixel];
- red = (GLint) (255.0F * ctx->Pixel.MapItoR[index]);
- green = (GLint) (255.0F * ctx->Pixel.MapItoG[index]);
- blue = (GLint) (255.0F * ctx->Pixel.MapItoB[index]);
- alpha = (GLint) (255.0F * ctx->Pixel.MapItoA[index]);
- }
- break;
- case GL_RGB:
- /* Fetch image RGBA values */
- red = ((GLubyte*) image->Data)[pixel*3+0];
- green = ((GLubyte*) image->Data)[pixel*3+1];
- blue = ((GLubyte*) image->Data)[pixel*3+2];
- alpha = 255;
- break;
- case GL_RGBA:
- red = ((GLubyte*) image->Data)[pixel*4+0];
- green = ((GLubyte*) image->Data)[pixel*4+1];
- blue = ((GLubyte*) image->Data)[pixel*4+2];
- alpha = ((GLubyte*) image->Data)[pixel*4+3];
- break;
- case GL_RED:
- red = ((GLubyte*) image->Data)[pixel];
- green = 0;
- blue = 0;
- alpha = 255;
- break;
- case GL_GREEN:
- red = 0;
- green = ((GLubyte*) image->Data)[pixel];
- blue = 0;
- alpha = 255;
- break;
- case GL_BLUE:
- red = 0;
- green = 0;
- blue = ((GLubyte*) image->Data)[pixel];
- alpha = 255;
- break;
- case GL_ALPHA:
- red = 0;
- green = 0;
- blue = 0;
- alpha = ((GLubyte*) image->Data)[pixel];
- break;
- case GL_LUMINANCE:
- red = ((GLubyte*) image->Data)[pixel];
- green = red;
- blue = red;
- alpha = 255;
- break;
- case GL_LUMINANCE_ALPHA:
- red = ((GLubyte*) image->Data)[pixel*2+0];
- green = red;
- blue = red;
- alpha = ((GLubyte*) image->Data)[pixel*2+1];
- break;
- default:
- gl_problem(ctx,"Bad format (2) in image_to_texture");
- return NULL;
- }
-
- if (scaleOrBias || ctx->Pixel.MapColorFlag) {
- /* Apply RGBA scale and bias */
- GLfloat r = red * (1.0F/255.0F);
- GLfloat g = green * (1.0F/255.0F);
- GLfloat b = blue * (1.0F/255.0F);
- GLfloat a = alpha * (1.0F/255.0F);
- if (scaleOrBias) {
- /* r,g,b,a now in [0,1] */
- r = r * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
- g = g * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
- b = b * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
- a = a * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
- r = CLAMP( r, 0.0F, 1.0F );
- g = CLAMP( g, 0.0F, 1.0F );
- b = CLAMP( b, 0.0F, 1.0F );
- a = CLAMP( a, 0.0F, 1.0F );
- }
- /* Apply pixel maps */
- if (ctx->Pixel.MapColorFlag) {
- GLint ir = (GLint) (r*ctx->Pixel.MapRtoRsize);
- GLint ig = (GLint) (g*ctx->Pixel.MapGtoGsize);
- GLint ib = (GLint) (b*ctx->Pixel.MapBtoBsize);
- GLint ia = (GLint) (a*ctx->Pixel.MapAtoAsize);
- r = ctx->Pixel.MapRtoR[ir];
- g = ctx->Pixel.MapGtoG[ig];
- b = ctx->Pixel.MapBtoB[ib];
- a = ctx->Pixel.MapAtoA[ia];
- }
- red = (GLint) (r * 255.0F);
- green = (GLint) (g * 255.0F);
- blue = (GLint) (b * 255.0F);
- alpha = (GLint) (a * 255.0F);
- }
-
- /* store texel (components are GLubytes in [0,255]) */
- switch (texImage->Format) {
- case GL_COLOR_INDEX:
- texImage->Data[pixel] = red; /* really an index */
- break;
- case GL_ALPHA:
- texImage->Data[pixel] = alpha;
- break;
- case GL_LUMINANCE:
- texImage->Data[pixel] = red;
- break;
- case GL_LUMINANCE_ALPHA:
- texImage->Data[pixel*2+0] = red;
- texImage->Data[pixel*2+1] = alpha;
- break;
- case GL_INTENSITY:
- texImage->Data[pixel] = red;
- break;
- case GL_RGB:
- texImage->Data[pixel*3+0] = red;
- texImage->Data[pixel*3+1] = green;
- texImage->Data[pixel*3+2] = blue;
- break;
- case GL_RGBA:
- texImage->Data[pixel*4+0] = red;
- texImage->Data[pixel*4+1] = green;
- texImage->Data[pixel*4+2] = blue;
- texImage->Data[pixel*4+3] = alpha;
- break;
- default:
- gl_problem(ctx,"Bad format (3) in image_to_texture");
- return NULL;
- }
- }
- break;
-
- case GL_FLOAT:
- for (pixel=0; pixel<numPixels; pixel++) {
- GLfloat red, green, blue, alpha;
- switch (texImage->Format) {
- case GL_COLOR_INDEX:
- if (decode_internal_format(internalFormat)==GL_COLOR_INDEX) {
- /* a paletted texture */
- GLint index = (GLint) ((GLfloat*) image->Data)[pixel];
- red = index;
- }
- else {
- GLint shift = ctx->Pixel.IndexShift;
- GLint offset = ctx->Pixel.IndexOffset;
- /* MapIto[RGBA]Size must be powers of two */
- GLint rMask = ctx->Pixel.MapItoRsize-1;
- GLint gMask = ctx->Pixel.MapItoGsize-1;
- GLint bMask = ctx->Pixel.MapItoBsize-1;
- GLint aMask = ctx->Pixel.MapItoAsize-1;
- /* Fetch image color index */
- GLint index = (GLint) ((GLfloat*) image->Data)[pixel];
- /* apply index shift and offset */
- if (shift>=0) {
- index = (index << shift) + offset;
- }
- else {
- index = (index >> -shift) + offset;
- }
- /* convert index to RGBA */
- red = ctx->Pixel.MapItoR[index & rMask];
- green = ctx->Pixel.MapItoG[index & gMask];
- blue = ctx->Pixel.MapItoB[index & bMask];
- alpha = ctx->Pixel.MapItoA[index & aMask];
- }
- break;
- case GL_RGB:
- /* Fetch image RGBA values */
- red = ((GLfloat*) image->Data)[pixel*3+0];
- green = ((GLfloat*) image->Data)[pixel*3+1];
- blue = ((GLfloat*) image->Data)[pixel*3+2];
- alpha = 1.0;
- break;
- case GL_RGBA:
- red = ((GLfloat*) image->Data)[pixel*4+0];
- green = ((GLfloat*) image->Data)[pixel*4+1];
- blue = ((GLfloat*) image->Data)[pixel*4+2];
- alpha = ((GLfloat*) image->Data)[pixel*4+3];
- break;
- case GL_RED:
- red = ((GLfloat*) image->Data)[pixel];
- green = 0.0;
- blue = 0.0;
- alpha = 1.0;
- break;
- case GL_GREEN:
- red = 0.0;
- green = ((GLfloat*) image->Data)[pixel];
- blue = 0.0;
- alpha = 1.0;
- break;
- case GL_BLUE:
- red = 0.0;
- green = 0.0;
- blue = ((GLfloat*) image->Data)[pixel];
- alpha = 1.0;
- break;
- case GL_ALPHA:
- red = 0.0;
- green = 0.0;
- blue = 0.0;
- alpha = ((GLfloat*) image->Data)[pixel];
- break;
- case GL_LUMINANCE:
- red = ((GLfloat*) image->Data)[pixel];
- green = red;
- blue = red;
- alpha = 1.0;
- break;
- case GL_LUMINANCE_ALPHA:
- red = ((GLfloat*) image->Data)[pixel*2+0];
- green = red;
- blue = red;
- alpha = ((GLfloat*) image->Data)[pixel*2+1];
- break;
- default:
- gl_problem(ctx,"Bad format (4) in image_to_texture");
- return NULL;
- }
-
- if (image->Format!=GL_COLOR_INDEX) {
- /* Apply RGBA scale and bias */
- if (scaleOrBias) {
- red = red * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
- green = green * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
- blue = blue * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
- alpha = alpha * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
- red = CLAMP( red, 0.0F, 1.0F );
- green = CLAMP( green, 0.0F, 1.0F );
- blue = CLAMP( blue, 0.0F, 1.0F );
- alpha = CLAMP( alpha, 0.0F, 1.0F );
- }
- /* Apply pixel maps */
- if (ctx->Pixel.MapColorFlag) {
- GLint ir = (GLint) (red *ctx->Pixel.MapRtoRsize);
- GLint ig = (GLint) (green*ctx->Pixel.MapGtoGsize);
- GLint ib = (GLint) (blue *ctx->Pixel.MapBtoBsize);
- GLint ia = (GLint) (alpha*ctx->Pixel.MapAtoAsize);
- red = ctx->Pixel.MapRtoR[ir];
- green = ctx->Pixel.MapGtoG[ig];
- blue = ctx->Pixel.MapBtoB[ib];
- alpha = ctx->Pixel.MapAtoA[ia];
- }
- }
-
- /* store texel (components are GLubytes in [0,255]) */
- switch (texImage->Format) {
- case GL_COLOR_INDEX:
- /* a paletted texture */
- texImage->Data[pixel] = (GLint) (red * 255.0F);
- break;
- case GL_ALPHA:
- texImage->Data[pixel] = (GLint) (alpha * 255.0F);
- break;
- case GL_LUMINANCE:
- texImage->Data[pixel] = (GLint) (red * 255.0F);
- break;
- case GL_LUMINANCE_ALPHA:
- texImage->Data[pixel*2+0] = (GLint) (red * 255.0F);
- texImage->Data[pixel*2+1] = (GLint) (alpha * 255.0F);
- break;
- case GL_INTENSITY:
- texImage->Data[pixel] = (GLint) (red * 255.0F);
- break;
- case GL_RGB:
- texImage->Data[pixel*3+0] = (GLint) (red * 255.0F);
- texImage->Data[pixel*3+1] = (GLint) (green * 255.0F);
- texImage->Data[pixel*3+2] = (GLint) (blue * 255.0F);
- break;
- case GL_RGBA:
- texImage->Data[pixel*4+0] = (GLint) (red * 255.0F);
- texImage->Data[pixel*4+1] = (GLint) (green * 255.0F);
- texImage->Data[pixel*4+2] = (GLint) (blue * 255.0F);
- texImage->Data[pixel*4+3] = (GLint) (alpha * 255.0F);
- break;
- default:
- gl_problem(ctx,"Bad format (5) in image_to_texture");
- return NULL;
- }
- }
- break;
-
- default:
- gl_problem(ctx, "Bad image type in image_to_texture");
- return NULL;
- }
-
- return texImage;
- }
-
-
-
- /*
- * glTexImage[123]D can accept a NULL image pointer. In this case we
- * create a texture image with unspecified image contents per the OpenGL
- * spec.
- */
- static struct gl_texture_image *
- make_null_texture( GLcontext *ctx, GLenum internalFormat,
- GLsizei width, GLsizei height, GLsizei depth, GLint border )
- {
- GLint components;
- struct gl_texture_image *texImage;
- GLint numPixels;
- (void) ctx;
-
- /*internalFormat = decode_internal_format(internalFormat);*/
- components = components_in_intformat(internalFormat);
- numPixels = width * height * depth;
-
- texImage = gl_alloc_texture_image();
- if (!texImage)
- return NULL;
-
- texImage->Format = (GLenum) decode_internal_format(internalFormat);
- texImage->IntFormat = internalFormat;
- texImage->Border = border;
- texImage->Width = width;
- texImage->Height = height;
- texImage->Depth = depth;
- texImage->WidthLog2 = logbase2(width - 2*border);
- if (height==1) /* 1-D texture */
- texImage->HeightLog2 = 0;
- else
- texImage->HeightLog2 = logbase2(height - 2*border);
- if (depth==1) /* 2-D texture */
- texImage->DepthLog2 = 0;
- else
- texImage->DepthLog2 = logbase2(depth - 2*border);
- texImage->Width2 = 1 << texImage->WidthLog2;
- texImage->Height2 = 1 << texImage->HeightLog2;
- texImage->Depth2 = 1 << texImage->DepthLog2;
- texImage->MaxLog2 = MAX2( texImage->WidthLog2, texImage->HeightLog2 );
-
- /* XXX should we really allocate memory for the image or let it be NULL? */
- /*texImage->Data = NULL;*/
-
- texImage->Data = (GLubyte *) malloc( numPixels * components );
-
- /*
- * Let's see if anyone finds this. If glTexImage2D() is called with
- * a NULL image pointer then load the texture image with something
- * interesting instead of leaving it indeterminate.
- */
- if (texImage->Data) {
- char message[8][32] = {
- " X X XXXXX XXX X ",
- " XX XX X X X X X ",
- " X X X X X X X ",
- " X X XXXX XXX XXXXX ",
- " X X X X X X ",
- " X X X X X X X ",
- " X X XXXXX XXX X X ",
- " "
- };
-
- GLubyte *imgPtr = texImage->Data;
- GLint i, j, k;
- for (i=0;i<height;i++) {
- GLint srcRow = 7 - i % 8;
- for (j=0;j<width;j++) {
- GLint srcCol = j % 32;
- GLubyte texel = (message[srcRow][srcCol]=='X') ? 255 : 70;
- for (k=0;k<components;k++) {
- *imgPtr++ = texel;
- }
- }
- }
- }
-
- return texImage;
- }
-
-
-
-
- /*
- * Test glTexImagee1D() parameters for errors.
- * Return: GL_TRUE = an error was detected, GL_FALSE = no errors
- */
- static GLboolean texture_1d_error_check( GLcontext *ctx, GLenum target,
- GLint level, GLint internalFormat,
- GLenum format, GLenum type,
- GLint width, GLint border )
- {
- GLint iformat;
- if (target!=GL_TEXTURE_1D && target!=GL_PROXY_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D" );
- return GL_TRUE;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(level)" );
- return GL_TRUE;
- }
- iformat = decode_internal_format( internalFormat );
- if (iformat<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(internalFormat)" );
- return GL_TRUE;
- }
- if (border!=0 && border!=1) {
- if (target!=GL_PROXY_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(border)" );
- }
- return GL_TRUE;
- }
- if (width<2*border || width>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(width)" );
- }
- return GL_TRUE;
- }
- if (logbase2( width-2*border )<0) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glTexImage1D(width != 2^k + 2*border)");
- return GL_TRUE;
- }
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_RGB:
- case GL_RGBA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_ABGR_EXT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(format)" );
- return GL_TRUE;
- }
- switch (type) {
- case GL_UNSIGNED_BYTE:
- case GL_BYTE:
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- case GL_UNSIGNED_INT:
- case GL_INT:
- case GL_FLOAT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(type)" );
- return GL_TRUE;
- }
- return GL_FALSE;
- }
-
-
- /*
- * Test glTexImagee2D() parameters for errors.
- * Return: GL_TRUE = an error was detected, GL_FALSE = no errors
- */
- static GLboolean texture_2d_error_check( GLcontext *ctx, GLenum target,
- GLint level, GLint internalFormat,
- GLenum format, GLenum type,
- GLint width, GLint height,
- GLint border )
- {
- GLint iformat;
- if (target!=GL_TEXTURE_2D && target!=GL_PROXY_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
- return GL_TRUE;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(level)" );
- return GL_TRUE;
- }
- iformat = decode_internal_format( internalFormat );
- if (iformat<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(internalFormat)" );
- return GL_TRUE;
- }
- if (border!=0 && border!=1) {
- if (target!=GL_PROXY_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(border)" );
- }
- return GL_TRUE;
- }
- if (width<2*border || width>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(width)" );
- }
- return GL_TRUE;
- }
- if (height<2*border || height>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(height)" );
- }
- return GL_TRUE;
- }
- if (logbase2( width-2*border )<0) {
- gl_error( ctx,GL_INVALID_VALUE,
- "glTexImage2D(width != 2^k + 2*border)");
- return GL_TRUE;
- }
- if (logbase2( height-2*border )<0) {
- gl_error( ctx,GL_INVALID_VALUE,
- "glTexImage2D(height != 2^k + 2*border)");
- return GL_TRUE;
- }
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_RGB:
- case GL_RGBA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_ABGR_EXT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(format)" );
- return GL_TRUE;
- }
- switch (type) {
- case GL_UNSIGNED_BYTE:
- case GL_BYTE:
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- case GL_UNSIGNED_INT:
- case GL_INT:
- case GL_FLOAT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(type)" );
- return GL_TRUE;
- }
- return GL_FALSE;
- }
-
-
- /*
- * Test glTexImage3DEXT() parameters for errors.
- * Return: GL_TRUE = an error was detected, GL_FALSE = no errors
- */
- static GLboolean texture_3d_error_check( GLcontext *ctx, GLenum target,
- GLint level, GLint internalFormat,
- GLenum format, GLenum type,
- GLint width, GLint height,
- GLint depth, GLint border )
- {
- GLint iformat;
- if (target!=GL_TEXTURE_3D_EXT && target!=GL_PROXY_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage3DEXT(target)" );
- return GL_TRUE;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(level)" );
- return GL_TRUE;
- }
- iformat = decode_internal_format( internalFormat );
- if (iformat<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(internalFormat)" );
- return GL_TRUE;
- }
- if (border!=0 && border!=1) {
- if (target!=GL_PROXY_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(border)" );
- }
- return GL_TRUE;
- }
- if (width<2*border || width>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(width)" );
- }
- return GL_TRUE;
- }
- if (height<2*border || height>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(height)" );
- }
- return GL_TRUE;
- }
- if (depth<2*border || depth>2+MAX_TEXTURE_SIZE) {
- if (target!=GL_PROXY_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexImage3DEXT(depth)" );
- }
- return GL_TRUE;
- }
- if (logbase2( width-2*border )<0) {
- gl_error( ctx,GL_INVALID_VALUE,
- "glTexImage3DEXT(width != 2^k + 2*border))");
- return GL_TRUE;
- }
- if (logbase2( height-2*border )<0) {
- gl_error( ctx,GL_INVALID_VALUE,
- "glTexImage3DEXT(height != 2^k + 2*border))");
- return GL_TRUE;
- }
- if (logbase2( depth-2*border )<0) {
- gl_error( ctx,GL_INVALID_VALUE,
- "glTexImage3DEXT(depth != 2^k + 2*border))");
- return GL_TRUE;
- }
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_RGB:
- case GL_RGBA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_ABGR_EXT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage3DEXT(format)" );
- return GL_TRUE;
- }
- switch (type) {
- case GL_UNSIGNED_BYTE:
- case GL_BYTE:
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- case GL_UNSIGNED_INT:
- case GL_INT:
- case GL_FLOAT:
- /* OK */
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage3DEXT(type)" );
- return GL_TRUE;
- }
- return GL_FALSE;
- }
-
-
-
- /*
- * Called from the API. Note that width includes the border.
- */
- void gl_TexImage1D( GLcontext *ctx,
- GLenum target, GLint level, GLint internalformat,
- GLsizei width, GLint border, GLenum format,
- GLenum type, struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexImage1D" );
- return;
- }
-
- if (target==GL_TEXTURE_1D) {
- struct gl_texture_image *teximage;
- if (texture_1d_error_check( ctx, target, level, internalformat,
- format, type, width, border )) {
- /* error in texture image was detected */
- return;
- }
-
- /* free current texture image, if any */
- if (texSet->Current1D->Image[level]) {
- gl_free_texture_image( texSet->Current1D->Image[level] );
- }
-
- /* make new texture from source image */
- if (image) {
- teximage = image_to_texture(ctx, image, internalformat, border);
- }
- else {
- teximage = make_null_texture(ctx, (GLenum) internalformat,
- width, 1, 1, border);
- }
-
- /* install new texture image */
- texSet->Current1D->Image[level] = teximage;
- texSet->Current1D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
- ctx->NewState |= NEW_TEXTURING;
-
- /* free the source image */
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
-
- /* tell driver about change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
- texSet->Current1D,
- level, internalformat, teximage );
- }
- }
- else if (target==GL_PROXY_TEXTURE_1D) {
- /* Proxy texture: check for errors and update proxy state */
- if (texture_1d_error_check( ctx, target, level, internalformat,
- format, type, width, border )) {
- if (level>=0 && level<MAX_TEXTURE_LEVELS) {
- MEMSET( ctx->Texture.Proxy1D->Image[level], 0,
- sizeof(struct gl_texture_image) );
- }
- }
- else {
- ctx->Texture.Proxy1D->Image[level]->Format = (GLenum) internalformat;
- ctx->Texture.Proxy1D->Image[level]->IntFormat = internalformat;
- ctx->Texture.Proxy1D->Image[level]->Border = border;
- ctx->Texture.Proxy1D->Image[level]->Width = width;
- ctx->Texture.Proxy1D->Image[level]->Height = 1;
- }
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
- }
- else {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
- return;
- }
- }
-
-
-
-
- /*
- * Called by the API or display list executor.
- * Note that width and height include the border.
- */
- void gl_TexImage2D( GLcontext *ctx,
- GLenum target, GLint level, GLint internalformat,
- GLsizei width, GLsizei height, GLint border,
- GLenum format, GLenum type,
- struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexImage2D" );
- return;
- }
-
- if (target==GL_TEXTURE_2D) {
- struct gl_texture_image *teximage;
- if (texture_2d_error_check( ctx, target, level, internalformat,
- format, type, width, height, border )) {
- /* error in texture image was detected */
- return;
- }
-
- /* free current texture image, if any */
- if (texSet->Current2D->Image[level]) {
- gl_free_texture_image( texSet->Current2D->Image[level] );
- }
-
- /* make new texture from source image */
- if (image) {
- teximage = image_to_texture(ctx, image, internalformat, border);
- }
- else {
- teximage = make_null_texture(ctx, (GLenum) internalformat,
- width, height, 1, border);
- }
-
- /* install new texture image */
- texSet->Current2D->Image[level] = teximage;
- texSet->Current2D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
- ctx->NewState |= NEW_TEXTURING;
-
- /* free the source image */
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
-
- /* tell driver about change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
- texSet->Current2D,
- level, internalformat, teximage );
- }
- }
- else if (target==GL_PROXY_TEXTURE_2D) {
- /* Proxy texture: check for errors and update proxy state */
- if (texture_2d_error_check( ctx, target, level, internalformat,
- format, type, width, height, border )) {
- if (level>=0 && level<MAX_TEXTURE_LEVELS) {
- MEMSET( ctx->Texture.Proxy2D->Image[level], 0,
- sizeof(struct gl_texture_image) );
- }
- }
- else {
- ctx->Texture.Proxy2D->Image[level]->Format = (GLenum) internalformat;
- ctx->Texture.Proxy2D->Image[level]->IntFormat = internalformat;
- ctx->Texture.Proxy2D->Image[level]->Border = border;
- ctx->Texture.Proxy2D->Image[level]->Width = width;
- ctx->Texture.Proxy2D->Image[level]->Height = height;
- }
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
- }
- else {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
- return;
- }
- }
-
-
-
- /*
- * Called by the API or display list executor.
- * Note that width and height include the border.
- */
- void gl_TexImage3DEXT( GLcontext *ctx,
- GLenum target, GLint level, GLint internalformat,
- GLsizei width, GLsizei height, GLsizei depth,
- GLint border, GLenum format, GLenum type,
- struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexImage3DEXT" );
- return;
- }
-
- if (target==GL_TEXTURE_3D_EXT) {
- struct gl_texture_image *teximage;
- if (texture_3d_error_check( ctx, target, level, internalformat,
- format, type, width, height, depth,
- border )) {
- /* error in texture image was detected */
- return;
- }
-
- /* free current texture image, if any */
- if (texSet->Current3D->Image[level]) {
- gl_free_texture_image( texSet->Current3D->Image[level] );
- }
-
- /* make new texture from source image */
- if (image) {
- teximage = image_to_texture(ctx, image, internalformat, border);
- }
- else {
- teximage = make_null_texture(ctx, (GLenum) internalformat,
- width, height, depth, border);
- }
-
- /* install new texture image */
- texSet->Current3D->Image[level] = teximage;
- texSet->Current3D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
- ctx->NewState |= NEW_TEXTURING;
-
- /* free the source image */
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
-
- /* tell driver about change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D_EXT,
- texSet->Current3D,
- level, internalformat, teximage );
- }
- }
- else if (target==GL_PROXY_TEXTURE_3D_EXT) {
- /* Proxy texture: check for errors and update proxy state */
- if (texture_3d_error_check( ctx, target, level, internalformat,
- format, type, width, height, depth,
- border )) {
- if (level>=0 && level<MAX_TEXTURE_LEVELS) {
- MEMSET( ctx->Texture.Proxy3D->Image[level], 0,
- sizeof(struct gl_texture_image) );
- }
- }
- else {
- ctx->Texture.Proxy3D->Image[level]->Format = (GLenum) internalformat;
- ctx->Texture.Proxy3D->Image[level]->IntFormat = internalformat;
- ctx->Texture.Proxy3D->Image[level]->Border = border;
- ctx->Texture.Proxy3D->Image[level]->Width = width;
- ctx->Texture.Proxy3D->Image[level]->Height = height;
- ctx->Texture.Proxy3D->Image[level]->Depth = depth;
- }
- if (image && image->RefCount==0) {
- /* if RefCount>0 then image must be in a display list */
- gl_free_image(image);
- }
- }
- else {
- gl_error( ctx, GL_INVALID_ENUM, "glTexImage3DEXT(target)" );
- return;
- }
- }
-
-
-
- void gl_GetTexImage( GLcontext *ctx, GLenum target, GLint level, GLenum format,
- GLenum type, GLvoid *pixels )
- {
- const struct gl_texture_object *texObj;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glGetTexImage" );
- return;
- }
-
- if (level < 0 || level >= MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
- return;
- }
-
- if (gl_sizeof_type(type) <= 0) {
- gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
- return;
- }
-
- if (gl_components_in_format(format) <= 0) {
- gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
- return;
- }
-
- if (!pixels)
- return; /* XXX generate an error??? */
-
- switch (target) {
- case GL_TEXTURE_1D:
- texObj = ctx->Texture.Set[ctx->Texture.CurrentSet].Current1D;
- break;
- case GL_TEXTURE_2D:
- texObj = ctx->Texture.Set[ctx->Texture.CurrentSet].Current2D;
- break;
- case GL_TEXTURE_3D:
- texObj = ctx->Texture.Set[ctx->Texture.CurrentSet].Current3D;
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(target)" );
- return;
- }
-
- if (texObj->Image[level] && texObj->Image[level]->Data) {
- const struct gl_texture_image *texImage = texObj->Image[level];
- GLint width = texImage->Width;
- GLint height = texImage->Height;
- GLint row;
-
- for (row = 0; row < height; row++) {
- /* compute destination address in client memory */
- GLvoid *dest = gl_pixel_addr_in_image( &ctx->Unpack, pixels,
- width, height,
- format, type, 0, row, 0);
-
- assert(dest);
- if (texImage->Format == GL_RGBA) {
- const GLubyte *src = texImage->Data + row * width * 4 * sizeof(GLubyte);
- gl_pack_rgba_span( ctx, width, (void *) src, format, type, dest );
- }
- else {
- /* fetch RGBA row from texture image then pack it in client mem */
- GLubyte rgba[MAX_WIDTH][4];
- GLint i;
- const GLubyte *src;
- switch (texImage->Format) {
- case GL_ALPHA:
- src = texImage->Data + row * width * sizeof(GLubyte);
- for (i = 0; i < width; i++) {
- rgba[i][RCOMP] = 255;
- rgba[i][GCOMP] = 255;
- rgba[i][BCOMP] = 255;
- rgba[i][ACOMP] = src[i];
- }
- break;
- case GL_LUMINANCE:
- src = texImage->Data + row * width * sizeof(GLubyte);
- for (i = 0; i < width; i++) {
- rgba[i][RCOMP] = src[i];
- rgba[i][GCOMP] = src[i];
- rgba[i][BCOMP] = src[i];
- rgba[i][ACOMP] = 255;
- }
- break;
- case GL_LUMINANCE_ALPHA:
- src = texImage->Data + row * 2 * width * sizeof(GLubyte);
- for (i = 0; i < width; i++) {
- rgba[i][RCOMP] = src[i*2+0];
- rgba[i][GCOMP] = src[i*2+0];
- rgba[i][BCOMP] = src[i*2+0];
- rgba[i][ACOMP] = src[i*2+1];
- }
- break;
- case GL_INTENSITY:
- src = texImage->Data + row * width * sizeof(GLubyte);
- for (i = 0; i < width; i++) {
- rgba[i][RCOMP] = src[i];
- rgba[i][GCOMP] = src[i];
- rgba[i][BCOMP] = src[i];
- rgba[i][ACOMP] = 255;
- }
- break;
- case GL_RGB:
- src = texImage->Data + row * 3 * width * sizeof(GLubyte);
- for (i = 0; i < width; i++) {
- rgba[i][RCOMP] = src[i*3+0];
- rgba[i][GCOMP] = src[i*3+1];
- rgba[i][BCOMP] = src[i*3+2];
- rgba[i][ACOMP] = 255;
- }
- break;
- case GL_RGBA:
- /* this special case should have been handled above! */
- gl_problem( ctx, "error 1 in gl_GetTexImage" );
- break;
- case GL_COLOR_INDEX:
- gl_problem( ctx, "GL_COLOR_INDEX not implemented in gl_GetTexImage" );
- break;
- default:
- gl_problem( ctx, "bad format in gl_GetTexImage" );
- }
- gl_pack_rgba_span( ctx, width, rgba, format, type, dest );
- }
- }
- }
- }
-
-
-
- /*
- * Unpack the image data given to glTexSubImage[12]D.
- * This function is just a wrapper for gl_unpack_image() but it does
- * some extra error checking.
- */
- struct gl_image *
- gl_unpack_texsubimage( GLcontext *ctx, GLint width, GLint height,
- GLenum format, GLenum type, const GLvoid *pixels )
- {
- if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
- return NULL;
- }
-
- if (format==GL_STENCIL_INDEX || format==GL_DEPTH_COMPONENT){
- return NULL;
- }
-
- if (gl_sizeof_type(type)<=0) {
- return NULL;
- }
-
- return gl_unpack_image3D( ctx, width, height, 1, format, type, pixels );
- }
-
-
- /*
- * Unpack the image data given to glTexSubImage3D.
- * This function is just a wrapper for gl_unpack_image() but it does
- * some extra error checking.
- */
- struct gl_image *
- gl_unpack_texsubimage3D( GLcontext *ctx, GLint width, GLint height, GLint depth,
- GLenum format, GLenum type, const GLvoid *pixels )
- {
- if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
- return NULL;
- }
-
- if (format==GL_STENCIL_INDEX || format==GL_DEPTH_COMPONENT){
- return NULL;
- }
-
- if (gl_sizeof_type(type)<=0) {
- return NULL;
- }
-
- return gl_unpack_image3D( ctx, width, height, depth, format, type, pixels );
- }
-
-
-
- void gl_TexSubImage1D( GLcontext *ctx,
- GLenum target, GLint level, GLint xoffset,
- GLsizei width, GLenum format, GLenum type,
- struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *destTex;
-
- if (target!=GL_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(level)" );
- return;
- }
-
- destTex = texSet->Current1D->Image[level];
- if (!destTex) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage1D" );
- return;
- }
-
- if (xoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset)" );
- return;
- }
- if (xoffset + width > (GLint) (destTex->Width + destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset+width)" );
- return;
- }
-
- if (image) {
- /* unpacking must have been error-free */
- GLint texcomponents = components_in_intformat(destTex->Format);
-
- if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
- /* Simple case, just byte copy image data into texture image */
- /* row by row. */
- GLubyte *dst = destTex->Data + texcomponents * xoffset;
- GLubyte *src = (GLubyte *) image->Data;
- MEMCPY( dst, src, width * texcomponents );
- }
- else {
- /* General case, convert image pixels into texels, scale, bias, etc */
- struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
- destTex->IntFormat, destTex->Border);
- GLubyte *dst = destTex->Data + texcomponents * xoffset;
- GLubyte *src = subTexImg->Data;
- MEMCPY( dst, src, width * texcomponents );
- gl_free_texture_image(subTexImg);
- }
-
- /* if the image's reference count is zero, delete it now */
- if (image->RefCount==0) {
- gl_free_image(image);
- }
-
- texSet->Current1D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
-
- /* tell driver about change */
- if (ctx->Driver.TexSubImage) {
- (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_1D,
- texSet->Current1D, level,
- xoffset,0,width,1,
- texSet->Current1D->Image[level]->IntFormat,
- destTex );
- }
- else {
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D, texSet->Current1D, level,
- texSet->Current1D->Image[level]->IntFormat,
- destTex );
- }
- }
- }
- else {
- /* if no image, an error must have occured, do more testing now */
- GLint components, size;
-
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(width)" );
- return;
- }
- if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
- return;
- }
- components = components_in_intformat( format );
- if (components<0 || format==GL_STENCIL_INDEX
- || format==GL_DEPTH_COMPONENT){
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
- return;
- }
- size = gl_sizeof_type( type );
- if (size<=0) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(type)" );
- return;
- }
- /* if we get here, probably ran out of memory during unpacking */
- gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage1D" );
- }
- }
-
-
-
- void gl_TexSubImage2D( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *destTex;
-
- if (target!=GL_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(level)" );
- return;
- }
-
- destTex = texSet->Current2D->Image[level];
- if (!destTex) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage2D" );
- return;
- }
-
- if (xoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset)" );
- return;
- }
- if (yoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset)" );
- return;
- }
- if (xoffset + width > (GLint) (destTex->Width + destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset+width)" );
- return;
- }
- if (yoffset + height > (GLint) (destTex->Height + destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset+height)" );
- return;
- }
-
- if (image) {
- /* unpacking must have been error-free */
- GLint texcomponents = components_in_intformat(destTex->Format);
-
- if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
- /* Simple case, just byte copy image data into texture image */
- /* row by row. */
- GLubyte *dst = destTex->Data
- + (yoffset * destTex->Width + xoffset) * texcomponents;
- GLubyte *src = (GLubyte *) image->Data;
- GLint j;
- for (j=0;j<height;j++) {
- MEMCPY( dst, src, width * texcomponents );
- dst += destTex->Width * texcomponents * sizeof(GLubyte);
- src += width * texcomponents * sizeof(GLubyte);
- }
- }
- else {
- /* General case, convert image pixels into texels, scale, bias, etc */
- struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
- destTex->IntFormat, destTex->Border);
- GLubyte *dst = destTex->Data
- + (yoffset * destTex->Width + xoffset) * texcomponents;
- GLubyte *src = subTexImg->Data;
- GLint j;
- for (j=0;j<height;j++) {
- MEMCPY( dst, src, width * texcomponents );
- dst += destTex->Width * texcomponents * sizeof(GLubyte);
- src += width * texcomponents * sizeof(GLubyte);
- }
- gl_free_texture_image(subTexImg);
- }
-
- /* if the image's reference count is zero, delete it now */
- if (image->RefCount==0) {
- gl_free_image(image);
- }
-
- texSet->Current2D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
-
- /* tell driver about change */
- if (ctx->Driver.TexSubImage) {
- (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_2D, texSet->Current2D, level,
- xoffset, yoffset, width, height,
- texSet->Current2D->Image[level]->IntFormat,
- destTex );
- }
- else {
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D, texSet->Current2D, level,
- texSet->Current2D->Image[level]->IntFormat,
- destTex );
- }
- }
- }
- else {
- /* if no image, an error must have occured, do more testing now */
- GLint components, size;
-
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(width)" );
- return;
- }
- if (height<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(height)" );
- return;
- }
- if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
- return;
- }
- components = gl_components_in_format( format );
- if (components<0 || format==GL_STENCIL_INDEX
- || format==GL_DEPTH_COMPONENT){
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(format)" );
- return;
- }
- size = gl_sizeof_type( type );
- if (size<=0) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(type)" );
- return;
- }
- /* if we get here, probably ran out of memory during unpacking */
- gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage2D" );
- }
- }
-
-
-
- void gl_TexSubImage3DEXT( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset, GLint zoffset,
- GLsizei width, GLsizei height, GLsizei depth,
- GLenum format, GLenum type,
- struct gl_image *image )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *destTex;
-
- if (target!=GL_TEXTURE_3D_EXT) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3DEXT(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3DEXT(level)" );
- return;
- }
-
- destTex = texSet->Current3D->Image[level];
- if (!destTex) {
- gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage3DEXT" );
- return;
- }
-
- if (xoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(xoffset)" );
- return;
- }
- if (yoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(yoffset)" );
- return;
- }
- if (zoffset < -((GLint)destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(zoffset)" );
- return;
- }
- if (xoffset + width > (GLint) (destTex->Width+destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(xoffset+width)" );
- return;
- }
- if (yoffset + height > (GLint) (destTex->Height+destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(yoffset+height)" );
- return;
- }
- if (zoffset + depth > (GLint) (destTex->Depth+destTex->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(zoffset+depth)" );
- return;
- }
-
- if (image) {
- /* unpacking must have been error-free */
- GLint texcomponents = components_in_intformat(destTex->Format);
- GLint dstRectArea = destTex->Width * destTex->Height;
- GLint srcRectArea = width * height;
-
- if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
- /* Simple case, just byte copy image data into texture image */
- /* row by row. */
- GLubyte *dst = destTex->Data
- + (zoffset * dstRectArea + yoffset * destTex->Width + xoffset)
- * texcomponents;
- GLubyte *src = (GLubyte *) image->Data;
- GLint j, k;
- for(k=0;k<depth; k++) {
- for (j=0;j<height;j++) {
- MEMCPY( dst, src, width * texcomponents );
- dst += destTex->Width * texcomponents;
- src += width * texcomponents;
- }
- dst += dstRectArea * texcomponents * sizeof(GLubyte);
- src += srcRectArea * texcomponents * sizeof(GLubyte);
- }
- }
- else {
- /* General case, convert image pixels into texels, scale, bias, etc */
- struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
- destTex->IntFormat, destTex->Border);
- GLubyte *dst = destTex->Data
- + (zoffset * dstRectArea + yoffset * destTex->Width + xoffset)
- * texcomponents;
- GLubyte *src = subTexImg->Data;
- GLint j, k;
- for(k=0;k<depth; k++) {
- for (j=0;j<height;j++) {
- MEMCPY( dst, src, width * texcomponents );
- dst += destTex->Width * texcomponents;
- src += width * texcomponents;
- }
- dst += dstRectArea * texcomponents * sizeof(GLubyte);
- src += srcRectArea * texcomponents * sizeof(GLubyte);
- }
- gl_free_texture_image(subTexImg);
- }
- /* if the image's reference count is zero, delete it now */
- if (image->RefCount==0) {
- gl_free_image(image);
- }
-
- texSet->Current3D->Dirty = GL_TRUE;
- ctx->Texture.AnyDirty = GL_TRUE;
-
- /* tell driver about change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D_EXT, texSet->Current3D,
- level, texSet->Current3D->Image[level]->IntFormat,
- destTex );
- }
- }
- else {
- /* if no image, an error must have occured, do more testing now */
- GLint components, size;
-
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(width)" );
- return;
- }
- if (height<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(height)" );
- return;
- }
- if (depth<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage3DEXT(depth)" );
- return;
- }
- if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3DEXT(format)" );
- return;
- }
- components = components_in_intformat( format );
- if (components<0 || format==GL_STENCIL_INDEX
- || format==GL_DEPTH_COMPONENT){
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3DEXT(format)" );
- return;
- }
- size = gl_sizeof_type( type );
- if (size<=0) {
- gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3DEXT(type)" );
- return;
- }
- /* if we get here, probably ran out of memory during unpacking */
- gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage3DEXT" );
- }
- }
-
-
-
- /*
- * Read an RGBA image from the frame buffer.
- * Input: ctx - the context
- * x, y - lower left corner
- * width, height - size of region to read
- * format - one of GL_RED, GL_RGB, GL_LUMINANCE, etc.
- * Return: gl_image pointer or NULL if out of memory
- */
- static struct gl_image *read_color_image( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format )
- {
- struct gl_image *image;
- GLubyte *imgptr;
- GLint components;
- GLint i, j;
-
- components = components_in_intformat( format );
-
- /*
- * Allocate image struct and image data buffer
- */
- image = (struct gl_image *) malloc( sizeof(struct gl_image) );
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = components;
- image->Format = format;
- image->Type = GL_UNSIGNED_BYTE;
- image->RefCount = 0;
- image->Data = (GLubyte *) malloc( width * height * components );
- if (!image->Data) {
- free(image);
- return NULL;
- }
- }
- else {
- return NULL;
- }
-
- imgptr = (GLubyte *) image->Data;
-
- /* Select buffer to read from */
- (void) (*ctx->Driver.SetBuffer)( ctx, ctx->Pixel.ReadBuffer );
-
- for (j=0;j<height;j++) {
- GLubyte rgba[MAX_WIDTH][4];
- gl_read_rgba_span( ctx, width, x, y+j, rgba );
-
- switch (format) {
- case GL_ALPHA:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][ACOMP];
- }
- break;
- case GL_LUMINANCE:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][RCOMP];
- }
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][RCOMP];
- *imgptr++ = rgba[i][ACOMP];
- }
- break;
- case GL_INTENSITY:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][RCOMP];
- }
- break;
- case GL_RGB:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][RCOMP];
- *imgptr++ = rgba[i][GCOMP];
- *imgptr++ = rgba[i][BCOMP];
- }
- break;
- case GL_RGBA:
- for (i=0;i<width;i++) {
- *imgptr++ = rgba[i][RCOMP];
- *imgptr++ = rgba[i][GCOMP];
- *imgptr++ = rgba[i][BCOMP];
- *imgptr++ = rgba[i][ACOMP];
- }
- break;
- default:
- gl_problem(ctx, "Bad format in read_color_image");
- break;
- } /*switch*/
-
- } /*for*/
-
- /* Restore drawing buffer */
- (void) (*ctx->Driver.SetBuffer)( ctx, ctx->Color.DrawBuffer );
-
- return image;
- }
-
-
-
-
- void gl_CopyTexImage1D( GLcontext *ctx,
- GLenum target, GLint level,
- GLenum internalformat,
- GLint x, GLint y,
- GLsizei width, GLint border )
- {
- GLint format;
- struct gl_image *teximage;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage1D" );
- return;
- }
- if (target!=GL_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(level)" );
- return;
- }
- if (border!=0 && border!=1) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(border)" );
- return;
- }
- if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(width)" );
- return;
- }
- format = decode_internal_format( internalformat );
- if (format<0 || (internalformat>=1 && internalformat<=4)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(format)" );
- return;
- }
-
- teximage = read_color_image( ctx, x, y, width, 1, (GLenum) format );
- if (!teximage) {
- gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
- return;
- }
-
- gl_TexImage1D( ctx, target, level, internalformat, width,
- border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
-
- /* teximage was freed in gl_TexImage1D */
- }
-
-
-
- void gl_CopyTexImage2D( GLcontext *ctx,
- GLenum target, GLint level, GLenum internalformat,
- GLint x, GLint y, GLsizei width, GLsizei height,
- GLint border )
- {
- GLint format;
- struct gl_image *teximage;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage2D" );
- return;
- }
- if (target!=GL_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(level)" );
- return;
- }
- if (border!=0 && border!=1) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(border)" );
- return;
- }
- if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width)" );
- return;
- }
- if (height<2*border || height>2+MAX_TEXTURE_SIZE || height<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(height)" );
- return;
- }
- format = decode_internal_format( internalformat );
- if (format<0 || (internalformat>=1 && internalformat<=4)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(format)" );
- return;
- }
-
- teximage = read_color_image( ctx, x, y, width, height, (GLenum) format );
- if (!teximage) {
- gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
- return;
- }
-
- gl_TexImage2D( ctx, target, level, internalformat, width, height,
- border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
-
- /* teximage was freed in gl_TexImage2D */
- }
-
-
-
-
- /*
- * Do the work of glCopyTexSubImage[123]D.
- * TODO: apply pixel bias scale and mapping.
- */
- static void copy_tex_sub_image( GLcontext *ctx, struct gl_texture_image *dest,
- GLint width, GLint height,
- GLint srcx, GLint srcy,
- GLint dstx, GLint dsty, GLint zoffset )
- {
- GLint i, j;
- GLint format, components, rectarea;
- GLint texwidth, texheight;
-
- texwidth = dest->Width;
- texheight = dest->Height;
- rectarea = texwidth * texheight;
- zoffset *= rectarea;
- format = dest->Format;
- components = components_in_intformat( format );
-
- /* Select buffer to read from */
- (void) (*ctx->Driver.SetBuffer)( ctx, ctx->Pixel.ReadBuffer );
-
- for (j=0;j<height;j++) {
- GLubyte rgba[MAX_WIDTH][4];
- GLubyte *texptr;
-
- gl_read_rgba_span( ctx, width, srcx, srcy+j, rgba );
-
- texptr = dest->Data + ( zoffset + (dsty+j) * texwidth + dstx) * components;
-
- switch (format) {
- case GL_ALPHA:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][ACOMP];
- }
- break;
- case GL_LUMINANCE:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][RCOMP];
- }
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][RCOMP];
- *texptr++ = rgba[i][ACOMP];
- }
- break;
- case GL_INTENSITY:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][RCOMP];
- }
- break;
- case GL_RGB:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][RCOMP];
- *texptr++ = rgba[i][GCOMP];
- *texptr++ = rgba[i][BCOMP];
- }
- break;
- case GL_RGBA:
- for (i=0;i<width;i++) {
- *texptr++ = rgba[i][RCOMP];
- *texptr++ = rgba[i][GCOMP];
- *texptr++ = rgba[i][BCOMP];
- *texptr++ = rgba[i][ACOMP];
- }
- break;
- } /*switch*/
- } /*for*/
-
-
- /* Restore drawing buffer */
- (void) (*ctx->Driver.SetBuffer)( ctx, ctx->Color.DrawBuffer );
- }
-
-
-
-
- void gl_CopyTexSubImage1D( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint x, GLint y, GLsizei width )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *teximage;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
- return;
- }
- if (target!=GL_TEXTURE_1D) {
- gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(level)" );
- return;
- }
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(width)" );
- return;
- }
-
- teximage = texSet->Current1D->Image[level];
-
- if (teximage) {
- if (xoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(xoffset)" );
- return;
- }
- /* NOTE: we're adding the border here, not subtracting! */
- if (xoffset+width > (GLint) (teximage->Width+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage1D(xoffset+width)" );
- return;
- }
- if (teximage->Data) {
- copy_tex_sub_image( ctx, teximage, width, 1, x, y, xoffset, 0, 0 );
-
- /* tell driver about change */
- if (ctx->Driver.TexSubImage) {
- (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_1D,
- texSet->Current1D, level,
- xoffset,0,width,1,
- teximage->IntFormat,
- teximage );
- }
- else {
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D, texSet->Current1D, level,
- teximage->IntFormat,
- teximage );
- }
- }
- }
- }
- else {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
- }
- }
-
-
-
- void gl_CopyTexSubImage2D( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset,
- GLint x, GLint y, GLsizei width, GLsizei height )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *teximage;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
- return;
- }
- if (target!=GL_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(level)" );
- return;
- }
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(width)" );
- return;
- }
- if (height<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(height)" );
- return;
- }
-
- teximage = texSet->Current2D->Image[level];
-
- if (teximage) {
- if (xoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(xoffset)" );
- return;
- }
- if (yoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(yoffset)" );
- return;
- }
- /* NOTE: we're adding the border here, not subtracting! */
- if (xoffset+width > (GLint) (teximage->Width+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage2D(xoffset+width)" );
- return;
- }
- if (yoffset+height > (GLint) (teximage->Height+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage2D(yoffset+height)" );
- return;
- }
-
- if (teximage->Data) {
- copy_tex_sub_image( ctx, teximage, width, height,
- x, y, xoffset, yoffset, 0 );
- /* tell driver about change */
- if (ctx->Driver.TexSubImage) {
- (*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_2D, texSet->Current2D, level,
- xoffset, yoffset, width, height,
- teximage->IntFormat,
- teximage );
- }
- else {
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D, texSet->Current2D, level,
- teximage->IntFormat,
- teximage );
- }
- }
- }
- }
- else {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
- }
- }
-
-
-
- void gl_CopyTexSubImage3DEXT( GLcontext *ctx,
- GLenum target, GLint level,
- GLint xoffset, GLint yoffset, GLint zoffset,
- GLint x, GLint y, GLsizei width, GLsizei height )
- {
- struct gl_texture_set *texSet = &ctx->Texture.Set[ctx->Texture.CurrentSet];
- struct gl_texture_image *teximage;
-
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage3DEXT" );
- return;
- }
- if (target!=GL_TEXTURE_2D) {
- gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3DEXT(target)" );
- return;
- }
- if (level<0 || level>=MAX_TEXTURE_LEVELS) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(level)" );
- return;
- }
- if (width<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(width)" );
- return;
- }
- if (height<0) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(height)" );
- return;
- }
-
- teximage = texSet->Current3D->Image[level];
- if (teximage) {
- if (xoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(xoffset)" );
- return;
- }
- if (yoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(yoffset)" );
- return;
- }
- if (zoffset < -((GLint)teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage3DEXT(zoffset)" );
- return;
- }
- /* NOTE: we're adding the border here, not subtracting! */
- if (xoffset+width > (GLint) (teximage->Width+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage3DEXT(xoffset+width)" );
- return;
- }
- if (yoffset+height > (GLint) (teximage->Height+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage3DEXT(yoffset+height)" );
- return;
- }
- if (zoffset > (GLint) (teximage->Depth+teximage->Border)) {
- gl_error( ctx, GL_INVALID_VALUE,
- "glCopyTexSubImage3DEXT(zoffset+depth)" );
- return;
- }
-
- if (teximage->Data) {
- copy_tex_sub_image( ctx, teximage, width, height,
- x, y, xoffset, yoffset, zoffset);
-
- /* tell driver about change */
- if (ctx->Driver.TexImage) {
- (*ctx->Driver.TexImage)( ctx, GL_TEXTURE_3D_EXT, texSet->Current3D,
- level, teximage->IntFormat,
- teximage );
- }
- }
- }
- else {
- gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage3DEXT" );
- }
- }
-
-