Mesa (master): mesa: Add state data structures required for ARB_shader_image_load_store.
Francisco Jerez
currojerez at kemper.freedesktop.org
Wed Jan 15 15:43:31 UTC 2014
Module: Mesa
Branch: master
Commit: 7a98741ef2bde20c33522ca4960253fa06cae2e2
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=7a98741ef2bde20c33522ca4960253fa06cae2e2
Author: Francisco Jerez <currojerez at riseup.net>
Date: Fri Nov 22 21:15:26 2013 -0800
mesa: Add state data structures required for ARB_shader_image_load_store.
v2: Increase MAX_IMAGE_UNITS to what i965 wants and add a separate
MAX_IMAGE_UNIFORMS define, clarify a couple of comments.
Reviewed-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441 at gmail.com>
---
src/mesa/main/config.h | 3 ++
src/mesa/main/dd.h | 1 +
src/mesa/main/mtypes.h | 103 ++++++++++++++++++++++++++++++++++++++++++++++++
src/mesa/main/texobj.c | 1 +
4 files changed, 108 insertions(+)
diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index 22bbfa0..ff9da77 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -175,6 +175,9 @@
#define MAX_COMBINED_ATOMIC_BUFFERS (MAX_UNIFORM_BUFFERS * 6)
/* Size of an atomic counter in bytes according to ARB_shader_atomic_counters */
#define ATOMIC_COUNTER_SIZE 4
+#define MAX_IMAGE_UNIFORMS 16
+/* 6 is for vertex, hull, domain, geometry, fragment, and compute shader. */
+#define MAX_IMAGE_UNITS (MAX_IMAGE_UNIFORMS * 6)
/*@}*/
/**
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 6e73691..f8237c9 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -39,6 +39,7 @@ struct gl_buffer_object;
struct gl_context;
struct gl_display_list;
struct gl_framebuffer;
+struct gl_image_unit;
struct gl_pixelstore_attrib;
struct gl_program;
struct gl_renderbuffer;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f23cd81..5ca46a9 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1230,6 +1230,9 @@ struct gl_texture_object
/** GL_OES_EGL_image_external */
GLint RequiredTextureImageUnits;
+
+ /** GL_ARB_shader_image_load_store */
+ GLenum ImageFormatCompatibilityType;
};
@@ -2402,6 +2405,32 @@ struct gl_shader
*/
GLenum OutputType;
} Geom;
+
+ /**
+ * Map from image uniform index to image unit (set by glUniform1i())
+ *
+ * An image uniform index is associated with each image uniform by
+ * the linker. The image index associated with each uniform is
+ * stored in the \c gl_uniform_storage::image field.
+ */
+ GLubyte ImageUnits[MAX_IMAGE_UNIFORMS];
+
+ /**
+ * Access qualifier specified in the shader for each image uniform
+ * index. Either \c GL_READ_ONLY, \c GL_WRITE_ONLY or \c
+ * GL_READ_WRITE.
+ *
+ * It may be different, though only more strict than the value of
+ * \c gl_image_unit::Access for the corresponding image unit.
+ */
+ GLenum ImageAccess[MAX_IMAGE_UNIFORMS];
+
+ /**
+ * Number of image uniforms defined in the shader. It specifies
+ * the number of valid elements in the \c ImageUnits and \c
+ * ImageAccess arrays above.
+ */
+ GLuint NumImages;
};
@@ -3089,9 +3118,13 @@ struct gl_program_constants
GLuint MaxUniformBlocks;
GLuint MaxCombinedUniformComponents;
GLuint MaxTextureImageUnits;
+
/* GL_ARB_shader_atomic_counters */
GLuint MaxAtomicBuffers;
GLuint MaxAtomicCounters;
+
+ /* GL_ARB_shader_image_load_store */
+ GLuint MaxImageUniforms;
};
@@ -3312,6 +3345,12 @@ struct gl_constants
/** GL_ARB_vertex_attrib_binding */
GLint MaxVertexAttribRelativeOffset;
GLint MaxVertexAttribBindings;
+
+ /* GL_ARB_shader_image_load_store */
+ GLuint MaxImageUnits;
+ GLuint MaxCombinedImageUnitsAndFragmentOutputs;
+ GLuint MaxImageSamples;
+ GLuint MaxCombinedImageUniforms;
};
@@ -3737,6 +3776,11 @@ struct gl_driver_flags
* gl_context::AtomicBufferBindings
*/
GLbitfield NewAtomicBuffer;
+
+ /**
+ * gl_context::ImageUnits
+ */
+ GLbitfield NewImageUnits;
};
struct gl_uniform_buffer_binding
@@ -3754,6 +3798,60 @@ struct gl_uniform_buffer_binding
};
/**
+ * ARB_shader_image_load_store image unit.
+ */
+struct gl_image_unit
+{
+ /**
+ * Texture object bound to this unit.
+ */
+ struct gl_texture_object *TexObj;
+
+ /**
+ * Level of the texture object bound to this unit.
+ */
+ GLuint Level;
+
+ /**
+ * \c GL_TRUE if the whole level is bound as an array of layers, \c
+ * GL_FALSE if only some specific layer of the texture is bound.
+ * \sa Layer
+ */
+ GLboolean Layered;
+
+ /**
+ * Layer of the texture object bound to this unit, or zero if the
+ * whole level is bound.
+ */
+ GLuint Layer;
+
+ /**
+ * Access allowed to this texture image. Either \c GL_READ_ONLY,
+ * \c GL_WRITE_ONLY or \c GL_READ_WRITE.
+ */
+ GLenum Access;
+
+ /**
+ * GL internal format that determines the interpretation of the
+ * image memory when shader image operations are performed through
+ * this unit.
+ */
+ GLenum Format;
+
+ /**
+ * Mesa format corresponding to \c Format.
+ */
+ gl_format _ActualFormat;
+
+ /**
+ * GL_TRUE if the state of this image unit is valid and access from
+ * the shader is allowed. Otherwise loads from this unit should
+ * return zero and stores should have no effect.
+ */
+ GLboolean _Valid;
+};
+
+/**
* Binding point for an atomic counter buffer object.
*/
struct gl_atomic_buffer_binding
@@ -3945,6 +4043,11 @@ struct gl_context
struct gl_atomic_buffer_binding
AtomicBufferBindings[MAX_COMBINED_ATOMIC_BUFFERS];
+ /**
+ * Array of image units for ARB_shader_image_load_store.
+ */
+ struct gl_image_unit ImageUnits[MAX_IMAGE_UNITS];
+
/*@}*/
struct gl_meta_state *Meta; /**< for "meta" operations */
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index d6510fe..319dd1d 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -157,6 +157,7 @@ _mesa_initialize_texture_object( struct gl_context *ctx,
obj->Sampler.sRGBDecode = GL_DECODE_EXT;
obj->BufferObjectFormat = GL_R8;
obj->_BufferObjectFormat = MESA_FORMAT_R8;
+ obj->ImageFormatCompatibilityType = GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE;
}
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