Mesa (master): r600g: add SRGB support.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 0a2a6c75bffc56d8dfde9b8a46c40222825630ea
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0a2a6c75bffc56d8dfde9b8a46c40222825630ea

Author: Dave Airlie <airlied at redhat.com>
Date:   Fri Aug  6 15:21:44 2010 +1000

r600g: add SRGB support.

This enables GL2.1 and passes glean's texture_srgb test.

---

 src/gallium/drivers/r600/r600_state.c         |   17 +++++++++++++----
 src/gallium/drivers/r600/r600_state_inlines.h |    8 ++++++++
 src/gallium/drivers/r600/r600d.h              |    2 ++
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 8214561..1a8ec48 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -669,8 +669,9 @@ static int r600_cb0(struct r600_context *rctx, struct radeon_state *rstate)
 	unsigned level = state->cbufs[0]->level;
 	unsigned pitch, slice;
 	unsigned color_info;
-	unsigned format, swap;
+	unsigned format, swap, ntype;
 	int r;
+	const struct util_format_description *desc;
 
 	r = radeon_state_init(rstate, rscreen->rw, R600_CB0_TYPE, R600_CB0);
 	if (r)
@@ -688,12 +689,19 @@ static int r600_cb0(struct r600_context *rctx, struct radeon_state *rstate)
 	pitch = (rtex->pitch[level] / rtex->bpt) / 8 - 1;
 	slice = (rtex->pitch[level] / rtex->bpt) * state->cbufs[0]->height / 64 - 1;
 
+	ntype = 0;
+	desc = util_format_description(rtex->resource.base.b.format);
+	if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
+		ntype = NUM_FORMAT_SRGB;
+
 	format = r600_translate_colorformat(rtex->resource.base.b.format);
 	swap = r600_translate_colorswap(rtex->resource.base.b.format);
+
 	color_info = S_0280A0_FORMAT(format) |
-	  S_0280A0_COMP_SWAP(swap) |
-	  S_0280A0_BLEND_CLAMP(1) |
-	  S_0280A0_SOURCE_FORMAT(1);
+		S_0280A0_COMP_SWAP(swap) |
+		S_0280A0_BLEND_CLAMP(1) |
+		S_0280A0_SOURCE_FORMAT(1) |
+		S_0280A0_NUMBER_TYPE(ntype);
 
 	rstate->states[R600_CB0__CB_COLOR0_BASE] = 0x00000000;
 	rstate->states[R600_CB0__CB_COLOR0_INFO] = color_info;
@@ -1136,6 +1144,7 @@ static int r600_resource(struct r600_context *rctx, struct radeon_state *rstate,
 			S_038010_DST_SEL_Y(r600_tex_swizzle(view->swizzle_g)) |
 			S_038010_DST_SEL_Z(r600_tex_swizzle(view->swizzle_r)) |
 			S_038010_DST_SEL_W(r600_tex_swizzle(view->swizzle_a)) |
+		        S_038010_FORCE_DEGAMMA(desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB ? 1 : 0) |
 			S_038010_BASE_LEVEL(view->first_level);
 	rstate->states[R600_PS_RESOURCE__RESOURCE0_WORD5] =
 			S_038014_LAST_LEVEL(view->last_level) |
diff --git a/src/gallium/drivers/r600/r600_state_inlines.h b/src/gallium/drivers/r600/r600_state_inlines.h
index 4a955da..fdc2938 100644
--- a/src/gallium/drivers/r600/r600_state_inlines.h
+++ b/src/gallium/drivers/r600/r600_state_inlines.h
@@ -166,6 +166,12 @@ static uint32_t r600_translate_colorswap(enum pipe_format format)
         case PIPE_FORMAT_B4G4R4X4_UNORM:
 		return SWAP_ALT;
 		/* 32-bit buffers. */
+
+        case PIPE_FORMAT_A8B8G8R8_SRGB:
+		return SWAP_STD_REV;
+        case PIPE_FORMAT_B8G8R8A8_SRGB:
+		return SWAP_ALT;
+
         case PIPE_FORMAT_B8G8R8A8_UNORM:
         case PIPE_FORMAT_B8G8R8X8_UNORM:
 		return SWAP_ALT;
@@ -244,6 +250,8 @@ static INLINE uint32_t r600_translate_colorformat(enum pipe_format format)
         case PIPE_FORMAT_X8B8G8R8_UNORM:
         case PIPE_FORMAT_R8G8B8X8_UNORM:
         case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
+        case PIPE_FORMAT_A8B8G8R8_SRGB:
+        case PIPE_FORMAT_B8G8R8A8_SRGB:
 		return V_0280A0_COLOR_8_8_8_8;
 
         case PIPE_FORMAT_R10G10B10A2_UNORM:
diff --git a/src/gallium/drivers/r600/r600d.h b/src/gallium/drivers/r600/r600d.h
index 2d0ede2..f9cad93 100644
--- a/src/gallium/drivers/r600/r600d.h
+++ b/src/gallium/drivers/r600/r600d.h
@@ -1174,4 +1174,6 @@
 #define SWAP_ALT 1
 #define SWAP_STD_REV 2
 #define SWAP_ALT_REV 3
+
+#define NUM_FORMAT_SRGB 6
 #endif