Use meta-path instead of blorp for 2D-blits.
Reduces cpu-overhead increasing the performance of meta-path. On
IVB (blorp disabled and hence meta path enabled) a microbenchmark
found in mesa-demos (copypixrate -blit -back):
x 62 10665.83 13388.95 11357.77 11467.463 574.57333
+ 62 19933.73 21140.67 20780.81 20757.792 184.91425
Difference at 95.0% confidence
9290.33 +/- 150.247
81.0147% +/- 1.3102%
Compared to default blorp meta is now on par (1-2% faster).
On BDW (where blorp isn't available) the same benchmark:
x 137 9055.4 14551.12 12020.87 12011.815 762.67232
+ 137 13963.49 18281.85 17031.56 16985.443 712.08714
Difference at 95.0% confidence
4973.63 +/- 174.726
41.4061% +/- 1.45462%
No visible changes in public benchmarks. No piglit regressions.
Signed-off-by: Topi Pohjolainen <topi.pohjolai...@intel.com>
---
src/mesa/drivers/dri/i965/brw_context.h | 10 ++++++++++
src/mesa/drivers/dri/i965/intel_fbo.c | 11 +++++++++++
2 files changed, 21 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_context.h
b/src/mesa/drivers/dri/i965/brw_context.h
index ae28955..a22f627 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1752,6 +1752,16 @@ brw_blorp_framebuffer(struct brw_context *brw,
GLbitfield mask, GLenum filter);
bool
+brw_meta_fbo_color_blit(struct brw_context *brw,
+ struct gl_framebuffer *read_fb,
+ struct gl_framebuffer *draw_fb,
+ float src_x0, float src_y0,
+ float src_x1, float src_y1,
+ float dst_x0, float dst_y0,
+ float dst_x1, float dst_y1,
+ GLenum filter);
+
+bool
brw_blorp_copytexsubimage(struct brw_context *brw,
struct gl_renderbuffer *src_rb,
struct gl_texture_image *dst_image,
diff --git a/src/mesa/drivers/dri/i965/intel_fbo.c
b/src/mesa/drivers/dri/i965/intel_fbo.c
index aebed72..077eb8b 100644
--- a/src/mesa/drivers/dri/i965/intel_fbo.c
+++ b/src/mesa/drivers/dri/i965/intel_fbo.c
@@ -878,6 +878,17 @@ intel_blit_framebuffer(struct gl_context *ctx,
if (!_mesa_check_conditional_render(ctx))
return;
+ if (brw->gen >= 6 && (mask & GL_COLOR_BUFFER_BIT)) {
+ if (brw_meta_fbo_color_blit(brw, readFb, drawFb,
+ srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1,
+ filter)) {
+ mask &= ~GL_COLOR_BUFFER_BIT;
+ if (mask == 0x0)
+ return;
+ }
+ }
+
mask = brw_blorp_framebuffer(brw, readFb, drawFb,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
--
1.9.3
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