mesa: GL_EXT_framebuffer_blit is not optional

Every driver supports it.  All current and future Gallium drivers always
support it, and all existing classic drivers support it.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i915/intel_extensions.c

@@ -63,7 +63,6 @@ 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_framebuffer_blit = true;
    ctx->Extensions.EXT_gpu_program_parameters = true;
    ctx->Extensions.EXT_pixel_buffer_object = true;
    ctx->Extensions.EXT_point_parameters = true;

src/mesa/drivers/dri/i965/intel_extensions.c

@@ -206,7 +206,6 @@ intelInitExtensions(struct gl_context *ctx)
    ctx->Extensions.EXT_blend_func_separate = true;
    ctx->Extensions.EXT_blend_minmax = true;
    ctx->Extensions.EXT_draw_buffers2 = true;
-   ctx->Extensions.EXT_framebuffer_blit = true;
    ctx->Extensions.EXT_framebuffer_sRGB = true;
    ctx->Extensions.EXT_gpu_program_parameters = true;
    ctx->Extensions.EXT_packed_float = true;

src/mesa/drivers/dri/nouveau/nouveau_context.c

@@ -184,7 +184,6 @@ nouveau_context_init(struct gl_context *ctx, struct nouveau_screen *screen,
 	/* Enable any supported extensions. */
 	ctx->Extensions.EXT_blend_color = true;
 	ctx->Extensions.EXT_blend_minmax = true;
-	ctx->Extensions.EXT_framebuffer_blit = true;
 	ctx->Extensions.EXT_texture_filter_anisotropic = true;
 	ctx->Extensions.NV_texture_env_combine4 = true;
 	ctx->Const.MaxColorAttachments = 1;

src/mesa/drivers/dri/r200/r200_context.c

@@ -382,7 +382,6 @@ GLboolean r200CreateContext( gl_api api,
    ctx->Extensions.EXT_blend_equation_separate = true;
    ctx->Extensions.EXT_blend_func_separate = true;
    ctx->Extensions.EXT_blend_minmax = true;
-   ctx->Extensions.EXT_framebuffer_blit = true;
    ctx->Extensions.EXT_gpu_program_parameters = true;
    ctx->Extensions.EXT_point_parameters = true;
    ctx->Extensions.EXT_texture_env_dot3 = true;

src/mesa/drivers/dri/radeon/radeon_context.c

@@ -336,7 +336,6 @@ r100CreateContext( gl_api api,
    ctx->Extensions.ARB_texture_mirror_clamp_to_edge = true;
    ctx->Extensions.ATI_texture_env_combine3 = true;
    ctx->Extensions.ATI_texture_mirror_once = true;
-   ctx->Extensions.EXT_framebuffer_blit = true;
    ctx->Extensions.EXT_texture_env_dot3 = true;
    ctx->Extensions.EXT_texture_filter_anisotropic = true;
    ctx->Extensions.EXT_texture_mirror_clamp = true;

src/mesa/main/extensions.c

@@ -195,7 +195,7 @@ static const struct extension extension_table[] = {
    { "GL_EXT_draw_instanced",                      o(ARB_draw_instanced),                      GL,             2006 },
    { "GL_EXT_draw_range_elements",                 o(dummy_true),                              GLL,            1997 },
    { "GL_EXT_fog_coord",                           o(dummy_true),                              GLL,            1999 },
-   { "GL_EXT_framebuffer_blit",                    o(EXT_framebuffer_blit),                    GL,             2005 },
+   { "GL_EXT_framebuffer_blit",                    o(dummy_true),                              GL,             2005 },
    { "GL_EXT_framebuffer_multisample",             o(EXT_framebuffer_multisample),             GL,             2005 },
    { "GL_EXT_framebuffer_multisample_blit_scaled", o(EXT_framebuffer_multisample_blit_scaled), GL,             2011 },
    { "GL_EXT_framebuffer_object",                  o(dummy_true),                              GLL,            2000 },
@@ -436,7 +436,6 @@ _mesa_enable_sw_extensions(struct gl_context *ctx)
    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
    ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
    ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
-   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
    ctx->Extensions.EXT_point_parameters = GL_TRUE;
    ctx->Extensions.EXT_provoking_vertex = GL_TRUE;

src/mesa/main/fbobject.c

@@ -163,8 +163,7 @@ invalidate_framebuffer(struct gl_framebuffer *fb)
 static struct gl_framebuffer *
 get_framebuffer_target(struct gl_context *ctx, GLenum target)
 {
-   bool have_fb_blit = _mesa_is_gles3(ctx) ||
+   bool have_fb_blit = _mesa_is_gles3(ctx) || _mesa_is_desktop_gl(ctx);
-      (ctx->Extensions.EXT_framebuffer_blit && _mesa_is_desktop_gl(ctx));
    switch (target) {
    case GL_DRAW_FRAMEBUFFER:
       return have_fb_blit ? ctx->DrawBuffer : NULL;
@@ -2037,26 +2036,12 @@ bind_framebuffer(GLenum target, GLuint framebuffer, bool allow_user_names)
    GLboolean bindReadBuf, bindDrawBuf;
    GET_CURRENT_CONTEXT(ctx);
 
-#ifdef DEBUG
-   if (ctx->Extensions.ARB_framebuffer_object) {
-      ASSERT(ctx->Extensions.EXT_framebuffer_blit);
-   }
-#endif
-
    switch (target) {
    case GL_DRAW_FRAMEBUFFER_EXT:
-      if (!ctx->Extensions.EXT_framebuffer_blit) {
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
-         return;
-      }
       bindDrawBuf = GL_TRUE;
       bindReadBuf = GL_FALSE;
       break;
    case GL_READ_FRAMEBUFFER_EXT:
-      if (!ctx->Extensions.EXT_framebuffer_blit) {
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
-         return;
-      }
       bindDrawBuf = GL_FALSE;
       bindReadBuf = GL_TRUE;
       break;
@@ -2190,7 +2175,7 @@ _mesa_DeleteFramebuffers(GLsizei n, const GLuint *framebuffers)
             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
 
             /* check if deleting currently bound framebuffer object */
-            if (ctx->Extensions.EXT_framebuffer_blit) {
+
                /* separate draw/read binding points */
                if (fb == ctx->DrawBuffer) {
                   /* bind default */
@@ -2202,15 +2187,7 @@ _mesa_DeleteFramebuffers(GLsizei n, const GLuint *framebuffers)
                   ASSERT(fb->RefCount >= 2);
                   _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER_EXT, 0);
                }
-            }
+
-            else {
-               /* only one binding point for read/draw buffers */
-               if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
-                  /* bind default */
-                  ASSERT(fb->RefCount >= 2);
-                  _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
-               }
-            }
 
 	    /* remove from hash table immediately, to free the ID */
 	    _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
@@ -3496,11 +3473,6 @@ _mesa_BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       }
    }
 
-   if (!ctx->Extensions.EXT_framebuffer_blit) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
-      return;
-   }
-
    /* Debug code */
    if (DEBUG_BLIT) {
       const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer;

src/mesa/main/get.c

@@ -362,7 +362,6 @@ EXTRA_EXT(EXT_stencil_two_side);
 EXTRA_EXT(EXT_depth_bounds_test);
 EXTRA_EXT(ARB_depth_clamp);
 EXTRA_EXT(ATI_fragment_shader);
-EXTRA_EXT(EXT_framebuffer_blit);
 EXTRA_EXT(EXT_provoking_vertex);
 EXTRA_EXT(ARB_fragment_shader);
 EXTRA_EXT(ARB_fragment_program);

src/mesa/main/get_hash_params.py

@@ -365,7 +365,7 @@ descriptor=[
 
 # GL_EXT_framebuffer_blit
 # NOTE: GL_DRAW_FRAMEBUFFER_BINDING_EXT == GL_FRAMEBUFFER_BINDING_EXT
-  [ "READ_FRAMEBUFFER_BINDING_EXT", "LOC_CUSTOM, TYPE_INT, 0, extra_EXT_framebuffer_blit" ],
+  [ "READ_FRAMEBUFFER_BINDING_EXT", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
 
 # GL_EXT_gpu_shader4 / GLSL 1.30
   [ "MIN_PROGRAM_TEXEL_OFFSET", "CONTEXT_INT(Const.MinProgramTexelOffset), extra_GLSL_130_es3" ],

src/mesa/main/mtypes.h

@@ -3457,7 +3457,6 @@ struct gl_extensions
    GLboolean EXT_blend_minmax;
    GLboolean EXT_depth_bounds_test;
    GLboolean EXT_draw_buffers2;
-   GLboolean EXT_framebuffer_blit;
    GLboolean EXT_framebuffer_multisample;
    GLboolean EXT_framebuffer_multisample_blit_scaled;
    GLboolean EXT_framebuffer_sRGB;

src/mesa/state_tracker/st_extensions.c

@@ -539,7 +539,6 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.EXT_blend_color = GL_TRUE;
    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
-   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
    ctx->Extensions.EXT_point_parameters = GL_TRUE;