mesa: Remove EXT_blend_subtract extension enable flag

All drivers remaining in Mesa support this extension.  This extension
is either required or optional features in desktop OpenGL, OpenGL ES
1.x, and OpenGL ES 2.x.

This extension was previously not supported on i810, mach64, mga,
savage, sis, and tdfx (Voodoo Banshee and Voodoo3).

Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

8 files changed, 0 insertions, 8 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 2256f4c37ae..710cc6352f0 100644
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -64,7 +64,6 @@ intelInitExtensions(struct gl_context *ctx)
    ctx->Extensions.EXT_blend_equation_separate = true;
    ctx->Extensions.EXT_blend_func_separate = true;
    ctx->Extensions.EXT_blend_minmax = true;
-   ctx->Extensions.EXT_blend_subtract = true;
    ctx->Extensions.EXT_framebuffer_blit = true;
    ctx->Extensions.EXT_framebuffer_object = true;
    ctx->Extensions.EXT_framebuffer_multisample = true;
diff --git a/src/mesa/drivers/dri/intel/intel_extensions_es.c b/src/mesa/drivers/dri/intel/intel_extensions_es.c
index 4e68d7e364a..4da75a1446b 100644
--- a/src/mesa/drivers/dri/intel/intel_extensions_es.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions_es.c
@@ -89,7 +89,6 @@ static const char *es2_extensions[] = {
    "GL_EXT_blend_color",
    "GL_EXT_blend_equation_separate",
    "GL_EXT_blend_minmax",
-   "GL_EXT_blend_subtract",
    "GL_NV_blend_square",
 
    /* Optional GLES2 */
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_context.c b/src/mesa/drivers/dri/nouveau/nouveau_context.c
index db80e44fb3f..0f2fab3c3a4 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_context.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_context.c
@@ -120,7 +120,6 @@ nouveau_context_init(struct gl_context *ctx, struct nouveau_screen *screen,
 	ctx->Extensions.ARB_texture_mirrored_repeat = true;
 	ctx->Extensions.EXT_blend_color = true;
 	ctx->Extensions.EXT_blend_minmax = true;
-	ctx->Extensions.EXT_blend_subtract = true;
 	ctx->Extensions.EXT_fog_coord = true;
 	ctx->Extensions.EXT_framebuffer_blit = true;
 	ctx->Extensions.EXT_framebuffer_object = true;
diff --git a/src/mesa/drivers/dri/r200/r200_context.c b/src/mesa/drivers/dri/r200/r200_context.c
index dc1946fd8a0..35e1c200af9 100644
--- a/src/mesa/drivers/dri/r200/r200_context.c
+++ b/src/mesa/drivers/dri/r200/r200_context.c
@@ -365,7 +365,6 @@ GLboolean r200CreateContext( gl_api api,
    ctx->Extensions.EXT_blend_color =
       rmesa->radeon.radeonScreen->drmSupportsBlendColor;
    ctx->Extensions.EXT_blend_minmax = true;
-   ctx->Extensions.EXT_blend_subtract = true;
    ctx->Extensions.EXT_fog_coord = true;
    ctx->Extensions.EXT_packed_depth_stencil = true;
    ctx->Extensions.EXT_secondary_color = true;
diff --git a/src/mesa/drivers/dri/r300/r300_context.c b/src/mesa/drivers/dri/r300/r300_context.c
index 94a255a5fc1..74de16fec78 100644
--- a/src/mesa/drivers/dri/r300/r300_context.c
+++ b/src/mesa/drivers/dri/r300/r300_context.c
@@ -378,7 +378,6 @@ static void r300InitGLExtensions(struct gl_context *ctx)
 	ctx->Extensions.EXT_blend_equation_separate = true;
 	ctx->Extensions.EXT_blend_func_separate = true;
 	ctx->Extensions.EXT_blend_minmax = true;
-	ctx->Extensions.EXT_blend_subtract = true;
 	ctx->Extensions.EXT_fog_coord = true;
 	ctx->Extensions.EXT_gpu_program_parameters = true;
 	ctx->Extensions.EXT_point_parameters = true;
diff --git a/src/mesa/drivers/dri/r600/r600_context.c b/src/mesa/drivers/dri/r600/r600_context.c
index 42bf1bc52c9..9da8a72d57f 100644
--- a/src/mesa/drivers/dri/r600/r600_context.c
+++ b/src/mesa/drivers/dri/r600/r600_context.c
@@ -276,7 +276,6 @@ static void r600InitGLExtensions(struct gl_context *ctx)
 	ctx->Extensions.EXT_blend_equation_separate = true;
 	ctx->Extensions.EXT_blend_func_separate = true;
 	ctx->Extensions.EXT_blend_minmax = true;
-	ctx->Extensions.EXT_blend_subtract = true;
 	ctx->Extensions.EXT_packed_depth_stencil = true;
 	ctx->Extensions.EXT_fog_coord = true;
 	ctx->Extensions.EXT_gpu_program_parameters = true;
diff --git a/src/mesa/drivers/dri/radeon/radeon_context.c b/src/mesa/drivers/dri/radeon/radeon_context.c
index 2750e832fc9..7a2a5e8af26 100644
--- a/src/mesa/drivers/dri/radeon/radeon_context.c
+++ b/src/mesa/drivers/dri/radeon/radeon_context.c
@@ -318,7 +318,6 @@ r100CreateContext( gl_api api,
    ctx->Extensions.ARB_texture_env_crossbar = true;
    ctx->Extensions.ARB_texture_env_dot3 = true;
    ctx->Extensions.ARB_texture_mirrored_repeat = true;
-   ctx->Extensions.EXT_blend_subtract = true;
    ctx->Extensions.EXT_fog_coord = true;
    ctx->Extensions.EXT_packed_depth_stencil = true;
    ctx->Extensions.EXT_secondary_color = true;
diff --git a/src/mesa/drivers/dri/swrast/swrast.c b/src/mesa/drivers/dri/swrast/swrast.c
index b76cd263132..ce6fadab36d 100644
--- a/src/mesa/drivers/dri/swrast/swrast.c
+++ b/src/mesa/drivers/dri/swrast/swrast.c
@@ -598,7 +598,6 @@ static const char *es2_extensions[] = {
    "GL_EXT_blend_color",
    "GL_EXT_blend_equation_separate",
    "GL_EXT_blend_minmax",
-   "GL_EXT_blend_subtract",
 
    /* Optional GLES2 */
    "GL_ARB_framebuffer_object",