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gfx/skia/trunk/src/gpu/gl/GrGLUniformManager.h@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLUniformManager.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/*
michael@0	2	* Copyright 2012 Google Inc.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license that can be
michael@0	5	* found in the LICENSE file.
michael@0	6	*/
michael@0	7
michael@0	8	#ifndef GrGLUniformManager_DEFINED
michael@0	9	#define GrGLUniformManager_DEFINED
michael@0	10
michael@0	11	#include "gl/GrGLShaderVar.h"
michael@0	12	#include "gl/GrGLSL.h"
michael@0	13	#include "GrAllocator.h"
michael@0	14
michael@0	15	#include "SkTArray.h"
michael@0	16
michael@0	17	class GrGpuGL;
michael@0	18	class SkMatrix;
michael@0	19
michael@0	20	/** Manages a program's uniforms.
michael@0	21	*/
michael@0	22	class GrGLUniformManager {
michael@0	23	public:
michael@0	24	// Opaque handle to a uniform
michael@0	25	class UniformHandle {
michael@0	26	public:
michael@0	27	static UniformHandle CreateFromUniformIndex(int i);
michael@0	28
michael@0	29	bool isValid() const { return 0 != fValue; }
michael@0	30
michael@0	31	bool operator==(const UniformHandle& other) const { return other.fValue == fValue; }
michael@0	32
michael@0	33	UniformHandle()
michael@0	34	: fValue(0) {
michael@0	35	}
michael@0	36
michael@0	37	private:
michael@0	38	UniformHandle(int value)
michael@0	39	: fValue(~value) {
michael@0	40	SkASSERT(isValid());
michael@0	41	}
michael@0	42
michael@0	43	int toUniformIndex() const { SkASSERT(isValid()); return ~fValue; }
michael@0	44
michael@0	45	int fValue;
michael@0	46	friend class GrGLUniformManager; // For accessing toUniformIndex().
michael@0	47	};
michael@0	48
michael@0	49	GrGLUniformManager(GrGpuGL* gpu);
michael@0	50
michael@0	51	UniformHandle appendUniform(GrSLType type, int arrayCount = GrGLShaderVar::kNonArray);
michael@0	52
michael@0	53	/** Functions for uploading uniform values. The varities ending in v can be used to upload to an
michael@0	54	* array of uniforms. arrayCount must be <= the array count of the uniform.
michael@0	55	*/
michael@0	56	void setSampler(UniformHandle, GrGLint texUnit) const;
michael@0	57	void set1f(UniformHandle, GrGLfloat v0) const;
michael@0	58	void set1fv(UniformHandle, int arrayCount, const GrGLfloat v[]) const;
michael@0	59	void set2f(UniformHandle, GrGLfloat, GrGLfloat) const;
michael@0	60	void set2fv(UniformHandle, int arrayCount, const GrGLfloat v[]) const;
michael@0	61	void set3f(UniformHandle, GrGLfloat, GrGLfloat, GrGLfloat) const;
michael@0	62	void set3fv(UniformHandle, int arrayCount, const GrGLfloat v[]) const;
michael@0	63	void set4f(UniformHandle, GrGLfloat, GrGLfloat, GrGLfloat, GrGLfloat) const;
michael@0	64	void set4fv(UniformHandle, int arrayCount, const GrGLfloat v[]) const;
michael@0	65	// matrices are column-major, the first three upload a single matrix, the latter three upload
michael@0	66	// arrayCount matrices into a uniform array.
michael@0	67	void setMatrix3f(UniformHandle, const GrGLfloat matrix[]) const;
michael@0	68	void setMatrix4f(UniformHandle, const GrGLfloat matrix[]) const;
michael@0	69	void setMatrix3fv(UniformHandle, int arrayCount, const GrGLfloat matrices[]) const;
michael@0	70	void setMatrix4fv(UniformHandle, int arrayCount, const GrGLfloat matrices[]) const;
michael@0	71
michael@0	72	// convenience method for uploading a SkMatrix to a 3x3 matrix uniform
michael@0	73	void setSkMatrix(UniformHandle, const SkMatrix&) const;
michael@0	74
michael@0	75	struct BuilderUniform {
michael@0	76	GrGLShaderVar fVariable;
michael@0	77	uint32_t fVisibility;
michael@0	78	};
michael@0	79	// This uses an allocator rather than array so that the GrGLShaderVars don't move in memory
michael@0	80	// after they are inserted. Users of GrGLShaderBuilder get refs to the vars and ptrs to their
michael@0	81	// name strings. Otherwise, we'd have to hand out copies.
michael@0	82	typedef GrTAllocator<BuilderUniform> BuilderUniformArray;
michael@0	83
michael@0	84	/**
michael@0	85	* Called by the GrGLShaderBuilder to know if the manager is using
michael@0	86	* BindUniformLocation. In that case getUniformLocations must be called
michael@0	87	* before the program is linked.
michael@0	88	*/
michael@0	89	bool isUsingBindUniform() const { return fUsingBindUniform; }
michael@0	90
michael@0	91	/**
michael@0	92	* Called by the GrGLShaderBuilder to get GL locations for all uniforms.
michael@0	93	*/
michael@0	94	void getUniformLocations(GrGLuint programID, const BuilderUniformArray& uniforms);
michael@0	95
michael@0	96	/**
michael@0	97	* Called by the GrGLShaderBuilder to access the array by the handle (index).
michael@0	98	*/
michael@0	99	const BuilderUniform& getBuilderUniform(const BuilderUniformArray&, GrGLUniformManager::UniformHandle) const;
michael@0	100
michael@0	101	private:
michael@0	102	enum {
michael@0	103	kUnusedUniform = -1,
michael@0	104	};
michael@0	105
michael@0	106	struct Uniform {
michael@0	107	GrGLint fVSLocation;
michael@0	108	GrGLint fFSLocation;
michael@0	109	GrSLType fType;
michael@0	110	int fArrayCount;
michael@0	111	};
michael@0	112
michael@0	113	bool fUsingBindUniform;
michael@0	114	SkTArray<Uniform, true> fUniforms;
michael@0	115	GrGpuGL* fGpu;
michael@0	116	};
michael@0	117
michael@0	118	#endif