1907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org/* 2907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * Copyright 2012 Google Inc. 3907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * 4907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * Use of this source code is governed by a BSD-style license that can be 5907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * found in the LICENSE file. 6907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 7907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 8907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org#ifndef GrTextureDomainEffect_DEFINED 9907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org#define GrTextureDomainEffect_DEFINED 10907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 11907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org#include "GrSingleTextureEffect.h" 12907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org#include "gl/GrGLEffect.h" 13907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 14907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgclass GrGLShaderBuilder; 15907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgstruct SkRect; 16907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 17907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org/** 18907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * Limits a texture's lookup coordinates to a domain. Samples outside the domain are either clamped 19907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * the edge of the domain or result in a vec4 of zeros (decal mode). The domain is clipped to 20907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * normalized texture coords ([0,1]x[0,1] square). Bilinear filtering can cause texels outside the 21907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * domain to affect the read value unless the caller considers this when calculating the domain. 22907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 23907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgclass GrTextureDomain { 24907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgpublic: 25907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org enum Mode { 26907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org kIgnore_Mode, // Ignore the texture domain rectangle. 27907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org kClamp_Mode, // Clamp texture coords to the domain rectangle. 28907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org kDecal_Mode, // Treat the area outside the domain rectangle as fully transparent. 29907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 30907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org kLastMode = kDecal_Mode 31907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org }; 32907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org static const int kModeCount = kLastMode + 1; 33907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 347d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org static const GrTextureDomain& IgnoredDomain() { 357d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org static const SkRect gDummyRect = {0, 0, 0, 0}; 367d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org static const GrTextureDomain gDomain(gDummyRect, kIgnore_Mode); 377d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org return gDomain; 387d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org } 397d7f31433b627e62f518e9186d3f2d9bd44662e0commit-bot@chromium.org 40907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /** 41907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * @param index Pass a value >= 0 if using multiple texture domains in the same effect. 42907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * It is used to keep inserted variables from causing name collisions. 43907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 44907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureDomain(const SkRect& domain, Mode, int index = -1); 45907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 46907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkRect& domain() const { return fDomain; } 47907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org Mode mode() const { return fMode; } 48907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 49907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /* Computes a domain that bounds all the texels in texelRect. Note that with bilerp enabled 50907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org texels neighboring the domain may be read. */ 51907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org static const SkRect MakeTexelDomain(const GrTexture* texture, const SkIRect& texelRect) { 52907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkScalar wInv = SK_Scalar1 / texture->width(); 53907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkScalar hInv = SK_Scalar1 / texture->height(); 54907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkRect result = { 55907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org texelRect.fLeft * wInv, 56907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org texelRect.fTop * hInv, 57907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org texelRect.fRight * wInv, 58907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org texelRect.fBottom * hInv 59907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org }; 60907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org return result; 61907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org } 62907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 63907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org bool operator== (const GrTextureDomain& that) const { 64907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org return fMode == that.fMode && fDomain == that.fDomain; 65907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org } 66907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 67907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /** 68907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * A GrGLEffect subclass that corresponds to a GrEffect subclass that uses GrTextureDomain 69907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * should include this helper. It generates the texture domain GLSL, produces the part of the 70907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * effect key that reflects the texture domain code, and performs the uniform uploads necessary 71907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * for texture domains. 72907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 73907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org class GLDomain { 74907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org public: 75907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GLDomain() { 76907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org fPrevDomain[0] = SK_FloatNaN; 77907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkDEBUGCODE(fMode = (Mode) -1;) 78907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org } 79907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 80907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /** 81907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * Call this from GrGLEffect::emitCode() to sample the texture W.R.T. the domain and mode. 82907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * 83907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * @param outcolor name of vec4 variable to hold the sampled color. 84907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * @param inCoords name of vec2 variable containing the coords to be used with the domain. 85907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * It is assumed that this is a variable and not an expression. 86907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * @param inModulateColor if non-NULL the sampled color will be modulated with this 87907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * expression before being written to outColor. 88907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 89907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org void sampleTexture(GrGLShaderBuilder* builder, 90907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const GrTextureDomain& textureDomain, 91907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const char* outColor, 92907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkString& inCoords, 93907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const GrGLEffect::TextureSampler sampler, 94907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const char* inModulateColor = NULL); 95907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 96907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /** 97907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * Call this from GrGLEffect::setData() to upload uniforms necessary for the texture domain. 98907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * The rectangle is automatically adjusted to account for the texture's origin. 99907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 100907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org void setData(const GrGLUniformManager& uman, const GrTextureDomain& textureDomain, 101907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrSurfaceOrigin textureOrigin); 102907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 103907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org enum { 104907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org kDomainKeyBits = 2, // See DomainKey(). 105907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org }; 106907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 107907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org /** 108907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * GrGLEffect::GenKey() must call this and include the returned value in it's computed key. 109907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * The returned will be limited to the lower kDomainKeyBits bits. 110907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 111907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org static GrGLEffect::EffectKey DomainKey(const GrTextureDomain& domain) { 112907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GR_STATIC_ASSERT(kModeCount <= 4); 113907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org return domain.mode(); 114907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org } 115907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 116907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org private: 117907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkDEBUGCODE(Mode fMode;) 118907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrGLUniformManager::UniformHandle fDomainUni; 119907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkString fDomainName; 120907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrGLfloat fPrevDomain[4]; 121907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org }; 122907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 123907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgprotected: 124907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org Mode fMode; 125907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org SkRect fDomain; 126907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org int fIndex; 127907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 128907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org typedef GrSingleTextureEffect INHERITED; 129907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org}; 130907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 131907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgclass GrGLTextureDomainEffect; 132907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 133907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org/** 134907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org * A basic texture effect that uses GrTextureDomain. 135907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org */ 136907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgclass GrTextureDomainEffect : public GrSingleTextureEffect { 137907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 138907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgpublic: 139907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org static GrEffectRef* Create(GrTexture*, 140907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkMatrix&, 141907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkRect& domain, 142907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureDomain::Mode, 143907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureParams::FilterMode filterMode, 144907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrCoordSet = kLocal_GrCoordSet); 145907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 146907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org virtual ~GrTextureDomainEffect(); 147907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 148907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org static const char* Name() { return "TextureDomain"; } 149907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 150907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org typedef GrGLTextureDomainEffect GLEffect; 151907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 152907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; 153907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; 154907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 155907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const GrTextureDomain& textureDomain() const { return fTextureDomain; } 156907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 157907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgprotected: 158907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureDomain fTextureDomain; 159907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 160907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.orgprivate: 161907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureDomainEffect(GrTexture*, 162907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkMatrix&, 163907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org const SkRect& domain, 164907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureDomain::Mode, 165907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrTextureParams::FilterMode, 166907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GrCoordSet); 167907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 168907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; 169907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 170907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org GR_DECLARE_EFFECT_TEST; 171907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 172907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org typedef GrSingleTextureEffect INHERITED; 173907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org}; 174907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org 175907fbd53c5e5dd4cbde7b72f9242b51febd7ef95commit-bot@chromium.org#endif 176