From ff938bf059a41a9bdf4c2c93cebe4a3b8a89c201 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 21 Mar 2008 13:43:07 -0600 Subject: [PATCH] add a number of PBO validate/map/unmap functions Helper functions for (some) drivers, including swrast. cherry-picked from Mesa/master --- src/mesa/main/bufferobj.c | 187 +++++++++++++++++++++++++++++++++++- src/mesa/main/bufferobj.h | 39 +++++++- src/mesa/swrast/s_bitmap.c | 32 ++---- src/mesa/swrast/s_drawpix.c | 30 +----- src/mesa/swrast/s_readpix.c | 30 ++---- 5 files changed, 240 insertions(+), 78 deletions(-) diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index 009055a6ab6..71e571353f2 100644 --- a/src/mesa/main/bufferobj.c +++ b/src/mesa/main/bufferobj.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.5.1 + * Version: 7.1 * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. + * 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"), @@ -469,6 +469,189 @@ _mesa_validate_pbo_access(GLuint dimensions, } +/** + * If the source of glBitmap data is a PBO, check that we won't read out + * of buffer bounds, then map the buffer. + * If not sourcing from a PBO, just return the bitmap pointer. + * This is a helper function for (some) drivers. + * Return NULL if error. + * If non-null return, must call validate_and_map_bitmap_pbo() when done. + */ +const GLubyte * +_mesa_validate_and_map_bitmap_pbo(GLcontext *ctx, + GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap) +{ + const GLubyte *buf; + + if (unpack->BufferObj->Name) { + /* unpack from PBO */ + 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 NULL; + } + + if (unpack->BufferObj->Pointer) { + /* buffer is already mapped - that's an error */ + _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)"); + return NULL; + } + + buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, + GL_READ_ONLY_ARB, + unpack->BufferObj); + if (!buf) + return NULL; + + buf = ADD_POINTERS(buf, bitmap); + } + else { + /* unpack from normal memory */ + buf = bitmap; + } + + return buf; +} + + +/** + * Counterpart to validate_and_map_bitmap_pbo() + * This is a helper function for (some) drivers. + */ +void +_mesa_unmap_bitmap_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *unpack) +{ + if (unpack->BufferObj->Name) { + ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, + unpack->BufferObj); + } +} + + +/** + * \sa _mesa_validate_and_map_bitmap_pbo + */ +const GLvoid * +_mesa_validate_and_map_drawpix_pbo(GLcontext *ctx, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + const GLvoid *buf; + + if (unpack->BufferObj->Name) { + /* unpack from PBO */ + + if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, + format, type, pixels)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glDrawPixels(invalid PBO access)"); + return NULL; + } + + if (unpack->BufferObj->Pointer) { + /* buffer is already mapped - that's an error */ + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(PBO is mapped)"); + return NULL; + } + + buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, + GL_READ_ONLY_ARB, + unpack->BufferObj); + if (!buf) + return NULL; + + buf = ADD_POINTERS(buf, pixels); + } + else { + /* unpack from normal memory */ + buf = pixels; + } + + return buf; +} + + +/** + * \sa _mesa_unmap_bitmap_pbo + */ +void +_mesa_unmap_drapix_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *unpack) +{ + if (unpack->BufferObj->Name) { + ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, + unpack->BufferObj); + } +} + + +/** + * When doing glReadPixels into a PBO, this function will check for errors + * and map the buffer. + * Call _mesa_unmap_readpix_pbo() when finished + * \return NULL if error + */ +void * +_mesa_validate_and_map_readpix_pbo(GLcontext *ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *pack, + GLvoid *dest) +{ + void *buf; + + if (pack->BufferObj->Name) { + /* pack into PBO */ + if (!_mesa_validate_pbo_access(2, pack, width, height, 1, + format, type, dest)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glReadPixels(invalid PBO access)"); + return NULL; + } + + if (pack->BufferObj->Pointer) { + /* buffer is already mapped - that's an error */ + _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)"); + return NULL; + } + + buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, + GL_WRITE_ONLY_ARB, + pack->BufferObj); + if (!buf) + return NULL; + + buf = ADD_POINTERS(buf, dest); + } + else { + /* pack to normal memory */ + buf = dest; + } + + return buf; +} + + +/** + * Counterpart to validate_and_map_readpix_pbo() + */ +void +_mesa_unmap_readpix_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *pack) +{ + if (pack->BufferObj->Name) { + ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, pack->BufferObj); + } +} + + /** * Return the gl_buffer_object for the given ID. * Always return NULL for ID 0. diff --git a/src/mesa/main/bufferobj.h b/src/mesa/main/bufferobj.h index f54f9e9ff00..efb3b4711e1 100644 --- a/src/mesa/main/bufferobj.h +++ b/src/mesa/main/bufferobj.h @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.3 + * Version: 7.1 * - * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * 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"), @@ -86,6 +86,41 @@ _mesa_validate_pbo_access(GLuint dimensions, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *ptr); +extern const GLubyte * +_mesa_validate_and_map_bitmap_pbo(GLcontext *ctx, + GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap); + +extern void +_mesa_unmap_bitmap_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *unpack); + +extern const GLvoid * +_mesa_validate_and_map_drawpix_pbo(GLcontext *ctx, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels); + +extern void +_mesa_unmap_drapix_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *unpack); + + +extern void * +_mesa_validate_and_map_readpix_pbo(GLcontext *ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *pack, + GLvoid *dest); + +extern void +_mesa_unmap_readpix_pbo(GLcontext *ctx, + const struct gl_pixelstore_attrib *pack); + + extern void _mesa_unbind_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj ); diff --git a/src/mesa/swrast/s_bitmap.c b/src/mesa/swrast/s_bitmap.c index 1e7f6c18e6a..17f639fd557 100644 --- a/src/mesa/swrast/s_bitmap.c +++ b/src/mesa/swrast/s_bitmap.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.5.2 + * Version: 7.1 * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. + * 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"), @@ -57,24 +57,10 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py, ASSERT(ctx->RenderMode == GL_RENDER); - 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); + bitmap = _mesa_validate_and_map_bitmap_pbo(ctx, width, height, + unpack, bitmap); + if (!bitmap) { + return NULL; } RENDER_START(swrast,ctx); @@ -150,11 +136,7 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py, 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); - } + _mesa_unmap_bitmap_pbo(ctx, unpack); } diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c index 0cf425e1c62..2cf3501274f 100644 --- a/src/mesa/swrast/s_drawpix.c +++ b/src/mesa/swrast/s_drawpix.c @@ -812,7 +812,6 @@ draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y, } - /** * Execute software-based glDrawPixels. * By time we get here, all error checking will have been done. @@ -835,25 +834,10 @@ _swrast_DrawPixels( GLcontext *ctx, if (swrast->NewState) _swrast_validate_derived( ctx ); - if (unpack->BufferObj->Name) { - /* unpack from PBO */ - GLubyte *buf; - if (!_mesa_validate_pbo_access(2, unpack, width, height, 1, - format, type, pixels)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawPixels(invalid PBO access)"); - goto end; - } - 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, "glDrawPixels(PBO is mapped)"); - goto end; - } - pixels = ADD_POINTERS(buf, pixels); - } + pixels = _mesa_validate_and_map_drawpix_pbo(ctx, x, y, width, height, + format, type, unpack, pixels); + if (!pixels) + return; switch (format) { case GL_STENCIL_INDEX: @@ -894,11 +878,7 @@ end: 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); - } + _mesa_unmap_drapix_pbo(ctx, unpack); } diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c index fe9a70f4eae..f4f882ae840 100644 --- a/src/mesa/swrast/s_readpix.c +++ b/src/mesa/swrast/s_readpix.c @@ -572,25 +572,11 @@ _swrast_ReadPixels( GLcontext *ctx, goto end; } - if (clippedPacking.BufferObj->Name) { - /* pack into PBO */ - GLubyte *buf; - if (!_mesa_validate_pbo_access(2, &clippedPacking, width, height, 1, - format, type, pixels)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glReadPixels(invalid PBO access)"); - goto end; - } - buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - GL_WRITE_ONLY_ARB, - clippedPacking.BufferObj); - if (!buf) { - /* buffer is already mapped - that's an error */ - _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)"); - goto end; - } - pixels = ADD_POINTERS(buf, pixels); - } + pixels = _mesa_validate_and_map_readpix_pbo(ctx, x, y, width, height, + format, type, + &clippedPacking, pixels); + if (!pixels) + return; switch (format) { case GL_COLOR_INDEX: @@ -632,9 +618,5 @@ _swrast_ReadPixels( GLcontext *ctx, end: RENDER_FINISH(swrast, ctx); - if (clippedPacking.BufferObj->Name) { - /* done with PBO so unmap it now */ - ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - clippedPacking.BufferObj); - } + _mesa_unmap_readpix_pbo(ctx, &clippedPacking); } -- 2.30.2