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/*
* Mesa 3-D graphics library
* Version: 3.3
*
* 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
#include "glheader.h"
#include "bitmap.h"
#include "context.h"
#include "feedback.h"
#include "image.h"
#include "macros.h"
#include "pb.h"
#include "pixel.h"
#include "state.h"
#include "types.h"
#include "vbrender.h"
#endif
/*
* Render a bitmap.
*/
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;
GLdepth fragZ;
ASSERT(ctx->RenderMode == GL_RENDER);
if (!bitmap) {
return; /* NULL bitmap is legal, a no-op */
}
/* 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( PB, r, g, b, a );
}
else {
PB_SET_INDEX( PB, ctx->Current.RasterIndex );
}
fragZ = (GLdepth) ( ctx->Current.RasterPos[2] * ctx->Visual->DepthMaxF);
for (row=0; row<height; row++) {
const GLubyte *src = (const GLubyte *) _mesa_image_address( unpack,
bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
if (unpack->LsbFirst) {
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
if (*src & mask) {
PB_WRITE_PIXEL( PB, px+col, py+row, fragZ );
}
if (mask == 128U) {
src++;
mask = 1U;
}
else {
mask = mask << 1;
}
}
PB_CHECK_FLUSH( ctx, PB );
/* get ready for next row */
if (mask != 1)
src++;
}
else {
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
if (*src & mask) {
PB_WRITE_PIXEL( PB, px+col, py+row, fragZ );
}
if (mask == 1U) {
src++;
mask = 128U;
}
else {
mask = mask >> 1;
}
}
PB_CHECK_FLUSH( ctx, PB );
/* get ready for next row */
if (mask != 128)
src++;
}
}
gl_flush_pb(ctx);
}
/*
* Execute a glBitmap command.
*/
void
_mesa_Bitmap( GLsizei width, GLsizei height,
GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
const GLubyte *bitmap )
{
GET_CURRENT_CONTEXT(ctx);
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) {
if (bitmap) {
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->NewState) {
gl_update_state(ctx);
gl_reduced_prim_change( ctx, GL_BITMAP );
}
if (ctx->PB->primitive!=GL_BITMAP) { /* A.W. 1.1.2000 */
gl_reduced_prim_change( ctx, GL_BITMAP );
}
ctx->OcclusionResult = GL_TRUE;
if (ctx->Driver.Bitmap) {
/* let device driver try to render the bitmap */
completed = (*ctx->Driver.Bitmap)( ctx, x, y, width, height,
&ctx->Unpack, bitmap );
}
if (!completed) {
/* use generic function */
render_bitmap( ctx, x, y, width, height, &ctx->Unpack, 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;
}
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