diff options
Diffstat (limited to 'src/mesa/main/bufferobj.c')
| -rw-r--r-- | src/mesa/main/bufferobj.c | 187 |
1 files changed, 185 insertions, 2 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index 9ad2dccc12..3023d8fec3 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"), @@ -565,6 +565,189 @@ _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. */ |