From ad32dcf630c387e01f415f98717aad08d20ff9f2 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Mon, 1 Aug 2016 21:56:38 -0700 Subject: [PATCH] i965: Make BLORP's BlitFramebuffer follow the GL 4.4 sRGB rules. OpenGL 4.4 specifies that BlitFramebuffer should perform sRGB encode and decode like ES 3.x does, but only when GL_FRAMEBUFFER_SRGB is enabled. This is technically incompatible in certain cases, but is more consistent across GL, ES, and WebGL, and more flexible. The NVIDIA 367.35 drivers appear to follow this behavior. For the awful spec analysis, please read Piglit's tests/spec/arb_framebuffer_srgb/blit.c, which explains the differences between GL 4.1, 4.2, 4.3 (2012), 4.3 (2013), and 4.4, and why this is the right rule to implement. Note that ctx->Color.sRGBEnabled is initialized to _mesa_is_gles(ctx), and ES doesn't have enable/disable flags for GL_FRAMEBUFFER_SRGB, so it's effectively on all the time. This means the ES behavior should be unchanged. Signed-off-by: Kenneth Graunke Reviewed-by: Ian Romanick --- src/mesa/drivers/dri/i965/brw_blorp_blit.cpp | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp index 20bbe7f20ac..b903de1501c 100644 --- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp +++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp @@ -61,11 +61,14 @@ do_blorp_blit(struct brw_context *brw, GLbitfield buffer_bit, GLfloat dstX0, GLfloat dstY0, GLfloat dstX1, GLfloat dstY1, GLenum filter, bool mirror_x, bool mirror_y) { + const struct gl_context *ctx = &brw->ctx; + /* Find source/dst miptrees */ struct intel_mipmap_tree *src_mt = find_miptree(buffer_bit, src_irb); struct intel_mipmap_tree *dst_mt = find_miptree(buffer_bit, dst_irb); - const bool es = _mesa_is_gles(&brw->ctx); + const bool do_srgb = ctx->Color.sRGBEnabled; + /* Do the blit */ brw_blorp_blit_miptrees(brw, src_mt, src_irb->mt_level, src_irb->mt_layer, @@ -75,7 +78,7 @@ do_blorp_blit(struct brw_context *brw, GLbitfield buffer_bit, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, filter, mirror_x, mirror_y, - es, es); + do_srgb, do_srgb); dst_irb->need_downsample = true; } -- 2.30.2