From: Nanley Chery <nanley.g.ch...@intel.com>
v2: Use gl_renderbuffer::{Width,Height} (Jason)
Cc: "11.0 11.1" <mesa-sta...@lists.freedesktop.org>
Signed-off-by: Nanley Chery <nanley.g.ch...@intel.com>
---
src/mesa/main/image.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index e79e3e6..99f253c 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -670,7 +670,7 @@ _mesa_clip_drawpixels(const struct gl_context *ctx,
* so that the image region is entirely within the window bounds.
* Note: this is different from _mesa_clip_drawpixels() in that the
* scissor box is ignored, and we use the bounds of the current readbuffer
- * surface.
+ * surface or the attached image.
*
* \return GL_TRUE if region to read is in bounds
* GL_FALSE if region is completely out of bounds (nothing to read)
@@ -682,6 +682,18 @@ _mesa_clip_readpixels(const struct gl_context *ctx,
struct gl_pixelstore_attrib *pack)
{
const struct gl_framebuffer *buffer = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = buffer->_ColorReadBuffer;
+ GLsizei clip_width;
+ GLsizei clip_height;
+
+ if (rb) {
+ clip_width = rb->Width;
+ clip_height = rb->Height;
+ } else {
+ clip_width = buffer->Width;
+ clip_height = buffer->Height;
+ }
+
if (pack->RowLength == 0) {
pack->RowLength = *width;
@@ -694,8 +706,8 @@ _mesa_clip_readpixels(const struct gl_context *ctx,
*srcX = 0;
}
/* right clipping */
- if (*srcX + *width > (GLsizei) buffer->Width)
- *width -= (*srcX + *width - buffer->Width);
+ if (*srcX + *width > clip_width)
+ *width -= (*srcX + *width - clip_width);
if (*width <= 0)
return GL_FALSE;
@@ -707,8 +719,8 @@ _mesa_clip_readpixels(const struct gl_context *ctx,
*srcY = 0;
}
/* top clipping */
- if (*srcY + *height > (GLsizei) buffer->Height)
- *height -= (*srcY + *height - buffer->Height);
+ if (*srcY + *height > clip_height)
+ *height -= (*srcY + *height - clip_height);
if (*height <= 0)
return GL_FALSE;
--
2.7.0
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