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-rw-r--r--src/mesa/drivers/dri/radeon/radeon_common.c11
-rw-r--r--src/mesa/drivers/dri/radeon/radeon_common_context.c5
-rw-r--r--src/mesa/drivers/dri/radeon/radeon_common_context.h9
3 files changed, 24 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/radeon/radeon_common.c b/src/mesa/drivers/dri/radeon/radeon_common.c
index 3b8541a74a..08535180b8 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common.c
@@ -823,6 +823,17 @@ void radeonDrawBuffer( GLcontext *ctx, GLenum mode )
void radeonReadBuffer( GLcontext *ctx, GLenum mode )
{
+ if ((ctx->DrawBuffer != NULL) && (ctx->DrawBuffer->Name == 0)) {
+ struct radeon_context *const rmesa = RADEON_CONTEXT(ctx);
+ const GLboolean was_front_buffer_reading = rmesa->is_front_buffer_reading;
+ rmesa->is_front_buffer_reading = (mode == GL_FRONT_LEFT)
+ || (mode == GL_FRONT);
+
+ if (!was_front_buffer_reading && rmesa->is_front_buffer_reading) {
+ radeon_update_renderbuffers(rmesa->dri.context,
+ rmesa->dri.context->driReadablePriv);
+ }
+ }
/* nothing, until we implement h/w glRead/CopyPixels or CopyTexImage */
if (ctx->ReadBuffer == ctx->DrawBuffer) {
/* This will update FBO completeness status.
diff --git a/src/mesa/drivers/dri/radeon/radeon_common_context.c b/src/mesa/drivers/dri/radeon/radeon_common_context.c
index 94bda78ce3..828d6477f0 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common_context.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common_context.c
@@ -487,7 +487,10 @@ radeon_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
struct radeon_renderbuffer *stencil_rb;
i = 0;
- if (draw->color_rb[0]) {
+ if ((radeon->is_front_buffer_rendering ||
+ radeon->is_front_buffer_reading ||
+ !draw->color_rb[1])
+ && draw->color_rb[0]) {
attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
attachments[i++] = radeon_bits_per_pixel(draw->color_rb[0]);
}
diff --git a/src/mesa/drivers/dri/radeon/radeon_common_context.h b/src/mesa/drivers/dri/radeon/radeon_common_context.h
index 8781715af0..036d2658d9 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common_context.h
+++ b/src/mesa/drivers/dri/radeon/radeon_common_context.h
@@ -467,6 +467,15 @@ struct radeon_context {
*/
GLboolean is_front_buffer_rendering;
+ /**
+ * Track whether front-buffer is the current read target.
+ *
+ * This is closely associated with is_front_buffer_rendering, but may
+ * be set separately. The DRI2 fake front buffer must be referenced
+ * either way.
+ */
+ GLboolean is_front_buffer_reading;
+
/* info for radeon_clear_tris() */
struct {
struct gl_array_object *arrayObj;