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- /* $Id: bitmap.c,v 1.6 1999/11/08 15:28:08 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #ifndef XFree86Server
- #include <assert.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #else
- #include "GL/xf86glx.h"
- #endif
- #include "bitmap.h"
- #include "context.h"
- #include "feedback.h"
- #include "image.h"
- #include "macros.h"
- #include "pb.h"
- #include "pixel.h"
- #include "types.h"
- #include "vbrender.h"
- #endif
-
-
-
- /*
- * Render bitmap data.
- */
- static void render_bitmap( GLcontext *ctx, GLint px, GLint py,
- GLsizei width, GLsizei height,
- const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap )
- {
- struct pixel_buffer *PB = ctx->PB;
- GLint row, col;
- GLint pz;
-
- ASSERT(ctx->RenderMode == GL_RENDER);
-
- if (!bitmap) {
- return; /* NULL bitmap is legal, a no-op */
- }
-
- if (ctx->NewState) {
- gl_update_state(ctx);
- gl_reduced_prim_change( ctx, GL_BITMAP );
- }
-
- /* Set bitmap drawing color */
- if (ctx->Visual->RGBAflag) {
- GLint r, g, b, a;
- r = (GLint) (ctx->Current.RasterColor[0] * 255.0F);
- g = (GLint) (ctx->Current.RasterColor[1] * 255.0F);
- b = (GLint) (ctx->Current.RasterColor[2] * 255.0F);
- a = (GLint) (ctx->Current.RasterColor[3] * 255.0F);
- PB_SET_COLOR( ctx, PB, r, g, b, a );
- }
- else {
- PB_SET_INDEX( ctx, PB, ctx->Current.RasterIndex );
- }
-
- pz = (GLint) ( ctx->Current.RasterPos[2] * DEPTH_SCALE );
-
- for (row=0; row<height; row++) {
- const GLubyte *src = (const GLubyte *) gl_pixel_addr_in_image( unpack,
- bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
-
- if (unpack->LsbFirst) {
- /* Lsb first */
- GLubyte bitmask = 1;
- for (col=0; col<width; col++) {
- if (*src & bitmask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, pz );
- }
- bitmask = bitmask << 1;
- if (bitmask == 0U) {
- src++;
- bitmask = 1U;
- }
- }
-
- PB_CHECK_FLUSH( ctx, PB );
-
- /* get ready for next row */
- if (bitmask != 1)
- src++;
- }
- else {
- /* Msb first */
- GLubyte bitmask = 128;
- for (col=0; col<width; col++) {
- if (*src & bitmask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, pz );
- }
- bitmask = bitmask >> 1;
- if (bitmask == 0U) {
- src++;
- bitmask = 128U;
- }
- }
-
- PB_CHECK_FLUSH( ctx, PB );
-
- /* get ready for next row */
- if (bitmask!=128)
- src++;
- }
- }
-
- gl_flush_pb(ctx);
- }
-
-
-
- /*
- * Execute a glBitmap command.
- */
- void gl_Bitmap( GLcontext *ctx,
- GLsizei width, GLsizei height,
- GLfloat xorig, GLfloat yorig,
- GLfloat xmove, GLfloat ymove,
- const GLubyte *bitmap,
- const struct gl_pixelstore_attrib *packing )
- {
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glBitmap");
-
- /* Error checking */
- if (width < 0 || height < 0) {
- gl_error( ctx, GL_INVALID_VALUE, "glBitmap" );
- return;
- }
-
- if (ctx->Current.RasterPosValid == GL_FALSE) {
- return; /* do nothing */
- }
-
- if (ctx->RenderMode==GL_RENDER) {
- GLint x = (GLint) ( (ctx->Current.RasterPos[0] - xorig) + 0.0F );
- GLint y = (GLint) ( (ctx->Current.RasterPos[1] - yorig) + 0.0F );
- GLboolean completed = GL_FALSE;
- if (ctx->Driver.Bitmap) {
- /* let device driver try to render the bitmap */
- completed = (*ctx->Driver.Bitmap)( ctx, x, y, width, height,
- packing, bitmap );
- }
- if (!completed) {
- /* use generic function */
- render_bitmap( ctx, x, y, width, height, packing, bitmap );
- }
- }
- else if (ctx->RenderMode==GL_FEEDBACK) {
- GLfloat color[4], texcoord[4], invq;
- color[0] = ctx->Current.RasterColor[0];
- color[1] = ctx->Current.RasterColor[1];
- color[2] = ctx->Current.RasterColor[2];
- color[3] = ctx->Current.RasterColor[3];
- if (ctx->Current.Texcoord[0][3] == 0.0)
- invq = 1.0F;
- else
- invq = 1.0F / ctx->Current.RasterTexCoord[3];
- texcoord[0] = ctx->Current.RasterTexCoord[0] * invq;
- texcoord[1] = ctx->Current.RasterTexCoord[1] * invq;
- texcoord[2] = ctx->Current.RasterTexCoord[2] * invq;
- texcoord[3] = ctx->Current.RasterTexCoord[3];
- FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
- gl_feedback_vertex( ctx,
- ctx->Current.RasterPos,
- color, ctx->Current.RasterIndex, texcoord );
- }
- else if (ctx->RenderMode==GL_SELECT) {
- /* Bitmaps don't generate selection hits. See appendix B of 1.1 spec. */
- }
-
- /* update raster position */
- ctx->Current.RasterPos[0] += xmove;
- ctx->Current.RasterPos[1] += ymove;
- }
-