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authorEric Anholt <eric@anholt.net>2009-06-19 22:12:52 -0700
committerEric Anholt <eric@anholt.net>2009-06-19 22:18:16 -0700
commitdf70d3049a396af3601d2a1747770635a74120bb (patch)
tree04442a2ccd4ef78dc31b3a926fa732f9f74ca174 /src/mesa
parentafc981ee46791838f3cb83e11eb33938aa3efc83 (diff)
intel: Also get the DRI2 front buffer when doing front buffer reading.
Diffstat (limited to 'src/mesa')
-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 9712c38725..00a42111da 100644
--- a/src/mesa/drivers/dri/i965/Makefile
+++ b/src/mesa/drivers/dri/i965/Makefile
@@ -23,6 +23,7 @@ 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 df5c3fc176..e7357e78c5 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 4138764604..32ce0e207b 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -218,7 +218,9 @@ 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 7d3c80bb21..36f33b6f31 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -304,6 +304,14 @@ 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;
GLboolean use_texture_tiling;
GLboolean use_early_z;