diff options
Diffstat (limited to 'mesalib/src/mesa/main/pixelstore.c')
-rw-r--r-- | mesalib/src/mesa/main/pixelstore.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/pixelstore.c b/mesalib/src/mesa/main/pixelstore.c index 05f6583a4..fc815337b 100644 --- a/mesalib/src/mesa/main/pixelstore.c +++ b/mesalib/src/mesa/main/pixelstore.c @@ -284,3 +284,45 @@ _mesa_init_pixelstore( struct gl_context *ctx ) _mesa_reference_buffer_object(ctx, &ctx->DefaultPacking.BufferObj, ctx->Shared->NullBufferObj); } + + +/** + * Check if the given compressed pixel storage parameters are legal. + * Record a GL error if illegal. + * \return true if legal, false if illegal + */ +bool +_mesa_compressed_pixel_storage_error_check( + struct gl_context *ctx, + GLint dimensions, + const struct gl_pixelstore_attrib *packing, + const char *caller) +{ + if (!_mesa_is_desktop_gl(ctx) || !packing->CompressedBlockSize) + return true; + + if (packing->CompressedBlockWidth && + packing->SkipPixels % packing->CompressedBlockWidth) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(skip-pixels %% block-width)", caller); + return false; + } + + if (dimensions > 1 && + packing->CompressedBlockHeight && + packing->SkipRows % packing->CompressedBlockHeight) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(skip-rows %% block-height)", caller); + return false; + } + + if (dimensions > 2 && + packing->CompressedBlockDepth && + packing->SkipImages % packing->CompressedBlockDepth) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(skip-images %% block-depth)", caller); + return false; + } + + return true; +} |