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authorEric Anholt <eric@anholt.net>2009-06-19 22:12:52 -0700
committerEric Anholt <eric@anholt.net>2009-09-04 14:40:21 -0700
commitcf820a045f0626718ec147ebb26e31f82ec0b4fb (patch)
treeb65a9dd24fd2bbbf3d40e1a5b649783de6625ba9
parent2855ee82c6d74066e8d9e44b17b2ce3b5782110e (diff)
intel: Also get the DRI2 front buffer when doing front buffer reading.
(cherry picked from commit df70d3049a396af3601d2a1747770635a74120bb)
-rw-r--r--src/mesa/drivers/dri/i965/Makefile1
-rw-r--r--src/mesa/drivers/dri/intel/intel_buffers.c17
-rw-r--r--src/mesa/drivers/dri/intel/intel_context.c4
-rw-r--r--src/mesa/drivers/dri/intel/intel_context.h8
4 files changed, 29 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/Makefile b/src/mesa/drivers/dri/i965/Makefile
index 2934414d99..81c2fdb0dc 100644
--- a/src/mesa/drivers/dri/i965/Makefile
+++ b/src/mesa/drivers/dri/i965/Makefile
@@ -22,6 +22,7 @@ DRIVER_SOURCES = \
intel_pixel_bitmap.c \
intel_pixel_copy.c \
intel_pixel_draw.c \
+ intel_pixel_read.c \
intel_state.c \
intel_swapbuffers.c \
intel_tex.c \
diff --git a/src/mesa/drivers/dri/intel/intel_buffers.c b/src/mesa/drivers/dri/intel/intel_buffers.c
index d2fad9e4ea..44e34330a6 100644
--- a/src/mesa/drivers/dri/intel/intel_buffers.c
+++ b/src/mesa/drivers/dri/intel/intel_buffers.c
@@ -345,6 +345,23 @@ intelDrawBuffer(GLcontext * ctx, GLenum mode)
static void
intelReadBuffer(GLcontext * ctx, GLenum mode)
{
+ if ((ctx->DrawBuffer != NULL) && (ctx->DrawBuffer->Name == 0)) {
+ struct intel_context *const intel = intel_context(ctx);
+ const GLboolean was_front_buffer_reading =
+ intel->is_front_buffer_reading;
+
+ intel->is_front_buffer_reading = (mode == GL_FRONT_LEFT)
+ || (mode == GL_FRONT);
+
+ /* If we weren't front-buffer reading before but we are now, make sure
+ * that the front-buffer has actually been allocated.
+ */
+ if (!was_front_buffer_reading && intel->is_front_buffer_reading) {
+ intel_update_renderbuffers(intel->driContext,
+ intel->driContext->driDrawablePriv);
+ }
+ }
+
if (ctx->ReadBuffer == ctx->DrawBuffer) {
/* This will update FBO completeness status.
* A framebuffer will be incomplete if the GL_READ_BUFFER setting
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 50ae677d20..977fad9313 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -220,7 +220,9 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
struct intel_renderbuffer *stencil_rb;
i = 0;
- if ((intel->is_front_buffer_rendering || !intel_fb->color_rb[1])
+ if ((intel->is_front_buffer_rendering ||
+ intel->is_front_buffer_reading ||
+ !intel_fb->color_rb[1])
&& intel_fb->color_rb[0]) {
attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
attachments[i++] = intel_bits_per_pixel(intel_fb->color_rb[0]);
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index b3db561fd5..e2b3943fb5 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -295,6 +295,14 @@ struct intel_context
* easily.
*/
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;
drm_clip_rect_t fboRect; /**< cliprect for FBO rendering */