diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/main/drawpix.c | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c index e9de0c097a..6682b5e725 100644 --- a/src/mesa/main/drawpix.c +++ b/src/mesa/main/drawpix.c @@ -77,28 +77,30 @@ _mesa_DrawPixels( GLsizei width, GLsizei height, } if (ctx->RenderMode == GL_RENDER) { - /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ - GLint x = IROUND(ctx->Current.RasterPos[0]); - GLint y = IROUND(ctx->Current.RasterPos[1]); - - if (ctx->Unpack.BufferObj->Name) { - /* unpack from PBO */ - if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1, - format, type, pixels)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawPixels(invalid PBO access)"); - return; + if (width > 0 && height > 0) { + /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ + GLint x = IROUND(ctx->Current.RasterPos[0]); + GLint y = IROUND(ctx->Current.RasterPos[1]); + + if (ctx->Unpack.BufferObj->Name) { + /* unpack from PBO */ + if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1, + format, type, pixels)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glDrawPixels(invalid PBO access)"); + return; + } + if (ctx->Unpack.BufferObj->Pointer) { + /* buffer is mapped - that's an error */ + _mesa_error(ctx, GL_INVALID_OPERATION, + "glDrawPixels(PBO is mapped)"); + return; + } } - if (ctx->Unpack.BufferObj->Pointer) { - /* buffer is mapped - that's an error */ - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDrawPixels(PBO is mapped)"); - return; - } - } - ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, - &ctx->Unpack, pixels); + ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, + &ctx->Unpack, pixels); + } } else if (ctx->RenderMode == GL_FEEDBACK) { /* Feedback the current raster pos info */ @@ -159,10 +161,12 @@ _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height, if (ctx->RenderMode == GL_RENDER) { /* Round to satisfy conformance tests (matches SGI's OpenGL) */ - GLint destx = IROUND(ctx->Current.RasterPos[0]); - GLint desty = IROUND(ctx->Current.RasterPos[1]); - ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty, - type ); + if (width > 0 && height > 0) { + GLint destx = IROUND(ctx->Current.RasterPos[0]); + GLint desty = IROUND(ctx->Current.RasterPos[1]); + ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty, + type ); + } } else if (ctx->RenderMode == GL_FEEDBACK) { FLUSH_CURRENT( ctx, 0 ); |