glsl: Add compiler support for ARB_shader_texture_lod.

Signed-off-by: Kenneth Graunke <[email protected]>
Tested-by: Marek Olšák <[email protected]>

3 files changed, 174 insertions, 0 deletions

diff --git a/src/glsl/builtins/profiles/ARB_shader_texture_lod.frag b/src/glsl/builtins/profiles/ARB_shader_texture_lod.frag
new file mode 100644
index 00000000000..c15e2a10a5b
--- /dev/null
+++ b/src/glsl/builtins/profiles/ARB_shader_texture_lod.frag
@@ -0,0 +1,64 @@
+/*
+ * The existing isotropic vertex texture functions are added to the
+ * built-in functions for fragment shaders.
+ */
+vec4 texture1DLod    (sampler1D sampler, float coord, float lod);
+vec4 texture1DProjLod(sampler1D sampler, vec2  coord, float lod);
+vec4 texture1DProjLod(sampler1D sampler, vec4  coord, float lod);
+vec4 texture2DLod    (sampler2D sampler, vec2 coord, float lod);
+vec4 texture2DProjLod(sampler2D sampler, vec3 coord, float lod);
+vec4 texture2DProjLod(sampler2D sampler, vec4 coord, float lod);
+vec4 texture3DLod    (sampler3D sampler, vec3 coord, float lod);
+vec4 texture3DProjLod(sampler3D sampler, vec4 coord, float lod);
+vec4 textureCubeLod  (samplerCube sampler, vec3 coord, float lod);
+vec4 shadow1DLod    (sampler1DShadow sampler, vec3 coord, float lod);
+vec4 shadow2DLod    (sampler2DShadow sampler, vec3 coord, float lod);
+vec4 shadow1DProjLod(sampler1DShadow sampler, vec4 coord, float lod);
+vec4 shadow2DProjLod(sampler2DShadow sampler, vec4 coord, float lod);
+
+/* New anisotropic texture functions, providing explicit derivatives: */
+vec4 texture1DGradARB        (sampler1D sampler,
+                              float P, float dPdx, float dPdy);
+vec4 texture1DProjGradARB    (sampler1D sampler,
+                              vec2  P, float dPdx, float dPdy);
+vec4 texture1DProjGradARB    (sampler1D sampler,
+                              vec4  P, float dPdx, float dPdy);
+
+vec4 texture2DGradARB        (sampler2D sampler,
+                              vec2  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DProjGradARB    (sampler2D sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DProjGradARB    (sampler2D sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+vec4 texture3DGradARB        (sampler3D sampler,
+                              vec3  P, vec3  dPdx, vec3  dPdy);
+vec4 texture3DProjGradARB    (sampler3D sampler,
+                              vec4  P, vec3  dPdx, vec3  dPdy);
+
+vec4 textureCubeGradARB      (samplerCube sampler,
+                              vec3  P, vec3  dPdx, vec3  dPdy);
+
+vec4 shadow1DGradARB         (sampler1DShadow sampler,
+                              vec3  P, float dPdx, float dPdy);
+vec4 shadow1DProjGradARB     (sampler1DShadow sampler,
+                              vec4  P, float dPdx, float dPdy);
+
+vec4 shadow2DGradARB         (sampler2DShadow sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 shadow2DProjGradARB     (sampler2DShadow sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+#ifdef GL_ARB_texture_rectangle
+vec4 texture2DRectGradARB    (sampler2DRect sampler,
+                              vec2  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DRectProjGradARB(sampler2DRect sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DRectProjGradARB(sampler2DRect sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+vec4 shadow2DRectGradARB     (sampler2DRectShadow sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 shadow2DRectProjGradARB (sampler2DRectShadow sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+#endif
diff --git a/src/glsl/builtins/profiles/ARB_shader_texture_lod.vert b/src/glsl/builtins/profiles/ARB_shader_texture_lod.vert
new file mode 100644
index 00000000000..edfed26fc98
--- /dev/null
+++ b/src/glsl/builtins/profiles/ARB_shader_texture_lod.vert
@@ -0,0 +1,46 @@
+/* New anisotropic texture functions, providing explicit derivatives: */
+vec4 texture1DGradARB        (sampler1D sampler,
+                              float P, float dPdx, float dPdy);
+vec4 texture1DProjGradARB    (sampler1D sampler,
+                              vec2  P, float dPdx, float dPdy);
+vec4 texture1DProjGradARB    (sampler1D sampler,
+                              vec4  P, float dPdx, float dPdy);
+
+vec4 texture2DGradARB        (sampler2D sampler,
+                              vec2  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DProjGradARB    (sampler2D sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DProjGradARB    (sampler2D sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+vec4 texture3DGradARB        (sampler3D sampler,
+                              vec3  P, vec3  dPdx, vec3  dPdy);
+vec4 texture3DProjGradARB    (sampler3D sampler,
+                              vec4  P, vec3  dPdx, vec3  dPdy);
+
+vec4 textureCubeGradARB      (samplerCube sampler,
+                              vec3  P, vec3  dPdx, vec3  dPdy);
+
+vec4 shadow1DGradARB         (sampler1DShadow sampler,
+                              vec3  P, float dPdx, float dPdy);
+vec4 shadow1DProjGradARB     (sampler1DShadow sampler,
+                              vec4  P, float dPdx, float dPdy);
+
+vec4 shadow2DGradARB         (sampler2DShadow sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 shadow2DProjGradARB     (sampler2DShadow sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+#ifdef GL_ARB_texture_rectangle
+vec4 texture2DRectGradARB    (sampler2DRect sampler,
+                              vec2  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DRectProjGradARB(sampler2DRect sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 texture2DRectProjGradARB(sampler2DRect sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+
+vec4 shadow2DRectGradARB     (sampler2DRectShadow sampler,
+                              vec3  P, vec2  dPdx, vec2  dPdy);
+vec4 shadow2DRectProjGradARB (sampler2DRectShadow sampler,
+                              vec4  P, vec2  dPdx, vec2  dPdy);
+#endif
diff --git a/src/glsl/builtins/tools/texture_builtins.py b/src/glsl/builtins/tools/texture_builtins.py
index 2fbe79010f9..a4054caac98 100755
--- a/src/glsl/builtins/tools/texture_builtins.py
+++ b/src/glsl/builtins/tools/texture_builtins.py
@@ -369,6 +369,70 @@ def generate_texture_functions(fs):
     generate_sigs("", "tex", "2DArrayShadow")
     end_function(fs, "shadow2DArray")
 
+    # ARB_shader_texture_lod extension
+    start_function("texture1DGradARB")
+    generate_fiu_sigs("txd", "1D")
+    end_function(fs, "texture1DGradARB")
+
+    start_function("texture2DGradARB")
+    generate_fiu_sigs("txd", "2D")
+    end_function(fs, "texture2DGradARB")
+
+    start_function("texture3DGradARB")
+    generate_fiu_sigs("txd", "3D")
+    end_function(fs, "texture3DGradARB")
+
+    start_function("textureCubeGradARB")
+    generate_fiu_sigs("txd", "Cube")
+    end_function(fs, "textureCubeGradARB")
+
+    start_function("texture1DProjGradARB")
+    generate_fiu_sigs("txd", "1D", True)
+    generate_fiu_sigs("txd", "1D", True, 2)
+    end_function(fs, "texture1DProjGradARB")
+
+    start_function("texture2DProjGradARB")
+    generate_fiu_sigs("txd", "2D", True)
+    generate_fiu_sigs("txd", "2D", True, 1)
+    end_function(fs, "texture2DProjGradARB")
+
+    start_function("texture3DProjGradARB")
+    generate_fiu_sigs("txd", "3D", True)
+    end_function(fs, "texture3DProjGradARB")
+
+    start_function("shadow1DGradARB")
+    generate_sigs("", "txd", "1DShadow", False, 1)
+    end_function(fs, "shadow1DGradARB")
+
+    start_function("shadow1DProjGradARB")
+    generate_sigs("", "txd", "1DShadow", True, 1)
+    end_function(fs, "shadow1DProjGradARB")
+
+    start_function("shadow2DGradARB")
+    generate_sigs("", "txd", "2DShadow", False)
+    end_function(fs, "shadow2DGradARB")
+
+    start_function("shadow2DProjGradARB")
+    generate_sigs("", "txd", "2DShadow", True)
+    end_function(fs, "shadow2DProjGradARB")
+
+    start_function("texture2DRectGradARB")
+    generate_sigs("", "txd", "2DRect")
+    end_function(fs, "texture2DRectGradARB")
+
+    start_function("texture2DRectProjGradARB")
+    generate_sigs("", "txd", "2DRect", True)
+    generate_sigs("", "txd", "2DRect", True, 1)
+    end_function(fs, "texture2DRectProjGradARB")
+
+    start_function("shadow2DRectGradARB")
+    generate_sigs("", "txd", "2DRectShadow", False)
+    end_function(fs, "shadow2DRectGradARB")
+
+    start_function("shadow2DRectProjGradARB")
+    generate_sigs("", "txd", "2DRectShadow", True)
+    end_function(fs, "shadow2DRectProjGradARB")
+
     # Deprecated (110/120 style) functions with silly names:
     start_function("texture1D")
     generate_sigs("", "tex", "1D")