diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_bitmap.c')
-rw-r--r-- | mesalib/src/mesa/swrast/s_bitmap.c | 445 |
1 files changed, 223 insertions, 222 deletions
diff --git a/mesalib/src/mesa/swrast/s_bitmap.c b/mesalib/src/mesa/swrast/s_bitmap.c index 9b52e9053..18f1c1866 100644 --- a/mesalib/src/mesa/swrast/s_bitmap.c +++ b/mesalib/src/mesa/swrast/s_bitmap.c @@ -1,222 +1,223 @@ -/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2008 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.
- */
-
-/**
- * \file swrast/s_bitmap.c
- * \brief glBitmap rendering.
- * \author Brian Paul
- */
-
-#include "main/glheader.h"
-#include "main/bufferobj.h"
-#include "main/condrender.h"
-#include "main/image.h"
-#include "main/macros.h"
-
-#include "s_context.h"
-#include "s_span.h"
-
-
-
-/**
- * Render a bitmap.
- * Called via ctx->Driver.Bitmap()
- * All parameter error checking will have been done before this is called.
- */
-void
-_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
- GLsizei width, GLsizei height,
- const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap )
-{
- GLint row, col;
- GLuint count = 0;
- SWspan span;
-
- ASSERT(ctx->RenderMode == GL_RENDER);
-
- if (!_mesa_check_conditional_render(ctx))
- return; /* don't draw */
-
- bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap);
- if (!bitmap)
- return;
-
- swrast_render_start(ctx);
-
- if (SWRAST_CONTEXT(ctx)->NewState)
- _swrast_validate_derived( ctx );
-
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_XY;
- _swrast_span_default_attribs(ctx, &span);
-
- for (row = 0; row < height; row++) {
- 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++) {
- if (*src & mask) {
- span.array->x[count] = px + col;
- span.array->y[count] = py + row;
- count++;
- }
- if (mask == 128U) {
- src++;
- mask = 1U;
- }
- else {
- mask = mask << 1;
- }
- }
-
- /* 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) {
- span.array->x[count] = px + col;
- span.array->y[count] = py + row;
- count++;
- }
- if (mask == 1U) {
- src++;
- mask = 128U;
- }
- else {
- mask = mask >> 1;
- }
- }
-
- /* get ready for next row */
- if (mask != 128)
- src++;
- }
-
- if (count + width >= MAX_WIDTH || row + 1 == height) {
- /* flush the span */
- span.end = count;
- _swrast_write_rgba_span(ctx, &span);
- span.end = 0;
- count = 0;
- }
- }
-
- swrast_render_finish(ctx);
-
- _mesa_unmap_pbo_source(ctx, unpack);
-}
-
-
-#if 0
-/*
- * XXX this is another way to implement Bitmap. Use horizontal runs of
- * fragments, initializing the mask array to indicate which fragments to
- * draw or skip.
- */
-void
-_swrast_Bitmap( struct gl_context *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;
- SWspan span;
-
- ASSERT(ctx->RenderMode == GL_RENDER);
- ASSERT(bitmap);
-
- swrast_render_start(ctx);
-
- if (SWRAST_CONTEXT(ctx)->NewState)
- _swrast_validate_derived( ctx );
-
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_MASK;
- _swrast_span_default_attribs(ctx, &span);
-
- /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
- span.x = px;
- span.y = py;
- /*span.end = width;*/
-
- 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;
- }
- }
-
- _swrast_write_rgba_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;
- }
- }
-
- _swrast_write_rgba_span(ctx, &span);
-
- /* get ready for next row */
- if (mask != 128)
- src++;
- }
- }
-
- swrast_render_finish(ctx);
-}
-#endif
+/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * Copyright (C) 1999-2008 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. + */ + +/** + * \file swrast/s_bitmap.c + * \brief glBitmap rendering. + * \author Brian Paul + */ + +#include "main/glheader.h" +#include "main/bufferobj.h" +#include "main/condrender.h" +#include "main/image.h" +#include "main/macros.h" +#include "main/pbo.h" + +#include "s_context.h" +#include "s_span.h" + + + +/** + * Render a bitmap. + * Called via ctx->Driver.Bitmap() + * All parameter error checking will have been done before this is called. + */ +void +_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py, + GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap ) +{ + GLint row, col; + GLuint count = 0; + SWspan span; + + ASSERT(ctx->RenderMode == GL_RENDER); + + if (!_mesa_check_conditional_render(ctx)) + return; /* don't draw */ + + bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap); + if (!bitmap) + return; + + swrast_render_start(ctx); + + if (SWRAST_CONTEXT(ctx)->NewState) + _swrast_validate_derived( ctx ); + + INIT_SPAN(span, GL_BITMAP); + span.end = width; + span.arrayMask = SPAN_XY; + _swrast_span_default_attribs(ctx, &span); + + for (row = 0; row < height; row++) { + 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++) { + if (*src & mask) { + span.array->x[count] = px + col; + span.array->y[count] = py + row; + count++; + } + if (mask == 128U) { + src++; + mask = 1U; + } + else { + mask = mask << 1; + } + } + + /* 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) { + span.array->x[count] = px + col; + span.array->y[count] = py + row; + count++; + } + if (mask == 1U) { + src++; + mask = 128U; + } + else { + mask = mask >> 1; + } + } + + /* get ready for next row */ + if (mask != 128) + src++; + } + + if (count + width >= MAX_WIDTH || row + 1 == height) { + /* flush the span */ + span.end = count; + _swrast_write_rgba_span(ctx, &span); + span.end = 0; + count = 0; + } + } + + swrast_render_finish(ctx); + + _mesa_unmap_pbo_source(ctx, unpack); +} + + +#if 0 +/* + * XXX this is another way to implement Bitmap. Use horizontal runs of + * fragments, initializing the mask array to indicate which fragments to + * draw or skip. + */ +void +_swrast_Bitmap( struct gl_context *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; + SWspan span; + + ASSERT(ctx->RenderMode == GL_RENDER); + ASSERT(bitmap); + + swrast_render_start(ctx); + + if (SWRAST_CONTEXT(ctx)->NewState) + _swrast_validate_derived( ctx ); + + INIT_SPAN(span, GL_BITMAP); + span.end = width; + span.arrayMask = SPAN_MASK; + _swrast_span_default_attribs(ctx, &span); + + /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */ + span.x = px; + span.y = py; + /*span.end = width;*/ + + 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; + } + } + + _swrast_write_rgba_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; + } + } + + _swrast_write_rgba_span(ctx, &span); + + /* get ready for next row */ + if (mask != 128) + src++; + } + } + + swrast_render_finish(ctx); +} +#endif |