-/* $Id: s_bitmap.c,v 1.5 2001/03/03 20:33:30 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
- *
+ * Version: 6.3
+ *
+ * Copyright (C) 1999-2004 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
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/**
+ * \file swrast/s_bitmap.c
+ * \brief glBitmap rendering.
+ * \author Brian Paul
+ */
#include "glheader.h"
+#include "bufferobj.h"
#include "image.h"
#include "macros.h"
#include "pixel.h"
#include "s_context.h"
-#include "s_fog.h"
-#include "s_pb.h"
+#include "s_span.h"
/*
* Render a bitmap.
*/
-void
+void
_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap )
{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint row, col;
- GLdepth fragZ;
- GLfixed fogCoord;
+ GLuint count = 0;
+ struct sw_span span;
ASSERT(ctx->RenderMode == GL_RENDER);
- ASSERT(bitmap);
+
+ if (unpack->BufferObj->Name) {
+ /* unpack from PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
+ GL_COLOR_INDEX, GL_BITMAP,
+ (GLvoid *) bitmap)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ GL_READ_ONLY_ARB,
+ unpack->BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
+ return;
+ }
+ bitmap = ADD_POINTERS(buf, bitmap);
+ }
+
+ RENDER_START(swrast,ctx);
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
- /* Set bitmap drawing color */
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_XY);
+
if (ctx->Visual.rgbMode) {
- GLint r, g, b, a;
- r = (GLint) (ctx->Current.RasterColor[0] * CHAN_MAXF);
- g = (GLint) (ctx->Current.RasterColor[1] * CHAN_MAXF);
- b = (GLint) (ctx->Current.RasterColor[2] * CHAN_MAXF);
- a = (GLint) (ctx->Current.RasterColor[3] * CHAN_MAXF);
- PB_SET_COLOR( PB, r, g, b, a );
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
}
else {
- PB_SET_INDEX( PB, ctx->Current.RasterIndex );
+ span.interpMask |= SPAN_INDEX;
+ span.index = FloatToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
}
- fragZ = (GLdepth) ( ctx->Current.RasterPos[2] * ctx->DepthMaxF);
-
- _mesa_win_fog_coords_from_z( ctx, 1, &fragZ, &fogCoord );
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (ctx->Fog.Enabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
- 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 );
+ for (row = 0; row < height; row++, span.y++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (unpack->LsbFirst) {
/* Lsb first */
GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
- for (col=0; col<width; col++) {
+ for (col = 0; col < width; col++) {
if (*src & mask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
}
if (mask == 128U) {
src++;
}
}
- 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++) {
+ for (col = 0; col < width; col++) {
if (*src & mask) {
- PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
}
if (mask == 1U) {
src++;
}
}
- PB_CHECK_FLUSH( ctx, PB );
-
/* get ready for next row */
if (mask != 128)
src++;
}
+
+ if (count + width >= MAX_WIDTH || row + 1 == height) {
+ /* flush the span */
+ span.end = count;
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_span(ctx, &span);
+ span.end = 0;
+ count = 0;
+ }
}
- _mesa_flush_pb(ctx);
+ RENDER_FINISH(swrast,ctx);
+
+ if (unpack->BufferObj->Name) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ unpack->BufferObj);
+ }
}
+#if 0
+/*
+ * XXX this is another way to implement Bitmap. Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragmens to
+ * draw or skip.
+ */
+void
+_swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint row, col;
+ struct sw_span span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+ ASSERT(bitmap);
+
+ RENDER_START(swrast,ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_MASK);
+
+ /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
+ span.x = px;
+ span.y = py;
+ /*span.end = width;*/
+ if (ctx->Visual.rgbMode) {
+ span.interpMask |= SPAN_RGBA;
+ span.red = FloatToFixed(ctx->Current.RasterColor[0] * CHAN_MAXF);
+ span.green = FloatToFixed(ctx->Current.RasterColor[1] * CHAN_MAXF);
+ span.blue = FloatToFixed(ctx->Current.RasterColor[2] * CHAN_MAXF);
+ span.alpha = FloatToFixed(ctx->Current.RasterColor[3] * CHAN_MAXF);
+ span.redStep = span.greenStep = span.blueStep = span.alphaStep = 0;
+ }
+ else {
+ span.interpMask |= SPAN_INDEX;
+ span.index = FloatToFixed(ctx->Current.RasterIndex);
+ span.indexStep = 0;
+ }
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (ctx->Fog.Enabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ for (row=0; row<height; row++, span.y++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ if (ctx->Visual.rgbMode)
+ _swrast_write_rgba_span(ctx, &span);
+ else
+ _swrast_write_index_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
+#endif
projects / mesa.git / blobdiff