This is a per-shader structure holding the SPIR-V data associated with the
shader (binary module, specialization constants and entry-point).
This is needed because both gl_shader and gl_linked_shader need to share this
data. Instead of copying the data, we pass a reference to it upon program
linking. That's why it is reference-counted.
This struct is created and associated with the shader upon calling
glShaderBinary(), then subsequently filled up by the call to
glSpecializeShaderARB().
---
src/mesa/main/glspirv.c | 19 +++++++++++++++++++
src/mesa/main/glspirv.h | 25 +++++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git a/src/mesa/main/glspirv.c b/src/mesa/main/glspirv.c
index eb869356632..d4724ad245c 100644
--- a/src/mesa/main/glspirv.c
+++ b/src/mesa/main/glspirv.c
@@ -42,6 +42,25 @@ _mesa_spirv_module_reference(struct gl_spirv_module **dest,
p_atomic_inc(&src->RefCount);
}
+void
+_mesa_shader_spirv_data_reference(struct gl_shader_spirv_data **dest,
+ struct gl_shader_spirv_data *src)
+{
+ struct gl_shader_spirv_data *old = *dest;
+
+ if (old) {
+ if (p_atomic_dec_zero(&old->RefCount)) {
+ _mesa_spirv_module_reference(&(*dest)->SpirVModule, NULL);
+ ralloc_free(old);
+ }
+ }
+
+ *dest = src;
+
+ if (src)
+ p_atomic_inc(&src->RefCount);
+}
+
void GLAPIENTRY
_mesa_SpecializeShaderARB(GLuint shader,
const GLchar *pEntryPoint,
diff --git a/src/mesa/main/glspirv.h b/src/mesa/main/glspirv.h
index 4e033735cfe..b8a0125ea9f 100644
--- a/src/mesa/main/glspirv.h
+++ b/src/mesa/main/glspirv.h
@@ -42,10 +42,35 @@ struct gl_spirv_module {
char Binary[0];
};
+/**
+ * SPIR-V data needed to compile and link a SPIR-V shader.
+ *
+ * It includes a SPIR-V binary that is potentially shared among different
+ * shaders; and shader-specific specialization constants and entry point.
+ *
+ * It is reference-counted because it is shared between gl_shader and its
+ * corresponding gl_linked_shader.
+ */
+struct gl_shader_spirv_data {
+ GLint RefCount;
+
+ struct gl_spirv_module *SpirVModule;
+
+ GLchar *SpirVEntryPoint;
+
+ GLuint NumSpecializationConstants;
+ GLuint *SpecializationConstantsIndex;
+ GLuint *SpecializationConstantsValue;
+};
+
void
_mesa_spirv_module_reference(struct gl_spirv_module **dest,
struct gl_spirv_module *src);
+void
+_mesa_shader_spirv_data_reference(struct gl_shader_spirv_data **dest,
+ struct gl_shader_spirv_data *src);
+
/**
* \name API functions
*/
--
2.11.0
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