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Diffstat (limited to 'src/mesa/main/framebuffer.c')
-rw-r--r--src/mesa/main/framebuffer.c33
1 files changed, 16 insertions, 17 deletions
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index af78363ad3..10d05243fe 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -35,6 +35,7 @@
#include "buffers.h"
#include "context.h"
#include "depthstencil.h"
+#include "macros.h"
#include "mtypes.h"
#include "fbobject.h"
#include "framebuffer.h"
@@ -418,14 +419,14 @@ _mesa_ResizeBuffersMESA( void )
/**
* Examine all the framebuffer's renderbuffers to update the Width/Height
* fields of the framebuffer. If we have renderbuffers with different
- * sizes, set the framebuffer's width and height to zero.
+ * sizes, set the framebuffer's width and height to the min size.
* Note: this is only intended for user-created framebuffers, not
* window-system framebuffes.
*/
static void
-update_framebuffer_size(struct gl_framebuffer *fb)
+update_framebuffer_size(GLcontext *ctx, struct gl_framebuffer *fb)
{
- GLboolean haveSize = GL_FALSE;
+ GLuint minWidth = ~0, minHeight = ~0;
GLuint i;
/* user-created framebuffers only */
@@ -435,21 +436,19 @@ update_framebuffer_size(struct gl_framebuffer *fb)
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
const struct gl_renderbuffer *rb = att->Renderbuffer;
if (rb) {
- if (haveSize) {
- if (rb->Width != fb->Width && rb->Height != fb->Height) {
- /* size mismatch! */
- fb->Width = 0;
- fb->Height = 0;
- return;
- }
- }
- else {
- fb->Width = rb->Width;
- fb->Height = rb->Height;
- haveSize = GL_TRUE;
- }
+ minWidth = MIN2(minWidth, rb->Width);
+ minHeight = MIN2(minHeight, rb->Height);
}
}
+
+ if (minWidth != ~0) {
+ fb->Width = minWidth;
+ fb->Height = minHeight;
+ }
+ else {
+ fb->Width = 0;
+ fb->Height = 0;
+ }
}
@@ -469,7 +468,7 @@ _mesa_update_draw_buffer_bounds(GLcontext *ctx)
if (buffer->Name) {
/* user-created framebuffer size depends on the renderbuffers */
- update_framebuffer_size(buffer);
+ update_framebuffer_size(ctx, buffer);
}
buffer->_Xmin = 0;