bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkBitmap.h" |
| 9 | #include "SkMagnifierImageFilter.h" |
| 10 | #include "SkColorPriv.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 11 | #include "SkReadBuffer.h" |
| 12 | #include "SkWriteBuffer.h" |
commit-bot@chromium.org | c0b7e10 | 2013-10-23 17:06:21 +0000 | [diff] [blame] | 13 | #include "SkValidationUtils.h" |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 14 | |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 15 | //////////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 0324570 | 2012-08-13 14:31:30 +0000 | [diff] [blame] | 16 | #if SK_SUPPORT_GPU |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 17 | #include "effects/GrSingleTextureEffect.h" |
bsalomon@google.com | d698f77 | 2012-10-25 13:22:00 +0000 | [diff] [blame] | 18 | #include "gl/GrGLEffect.h" |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 19 | #include "gl/GrGLSL.h" |
| 20 | #include "gl/GrGLTexture.h" |
bsalomon@google.com | 2eaaefd | 2012-10-29 19:51:22 +0000 | [diff] [blame] | 21 | #include "GrTBackendEffectFactory.h" |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 22 | |
| 23 | class GrGLMagnifierEffect; |
| 24 | |
| 25 | class GrMagnifierEffect : public GrSingleTextureEffect { |
| 26 | |
| 27 | public: |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 28 | static GrEffectRef* Create(GrTexture* texture, |
| 29 | float xOffset, |
| 30 | float yOffset, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 31 | float xInvZoom, |
| 32 | float yInvZoom, |
| 33 | float xInvInset, |
| 34 | float yInvInset) { |
bsalomon@google.com | 6340a41 | 2013-01-22 19:55:59 +0000 | [diff] [blame] | 35 | AutoEffectUnref effect(SkNEW_ARGS(GrMagnifierEffect, (texture, |
| 36 | xOffset, |
| 37 | yOffset, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 38 | xInvZoom, |
| 39 | yInvZoom, |
| 40 | xInvInset, |
| 41 | yInvInset))); |
bsalomon@google.com | a1ebbe4 | 2013-01-16 15:51:47 +0000 | [diff] [blame] | 42 | return CreateEffectRef(effect); |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 43 | } |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 44 | |
| 45 | virtual ~GrMagnifierEffect() {}; |
| 46 | |
| 47 | static const char* Name() { return "Magnifier"; } |
| 48 | |
bsalomon@google.com | 396e61f | 2012-10-25 19:00:29 +0000 | [diff] [blame] | 49 | virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 50 | virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 51 | |
| 52 | float x_offset() const { return fXOffset; } |
| 53 | float y_offset() const { return fYOffset; } |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 54 | float x_inv_zoom() const { return fXInvZoom; } |
| 55 | float y_inv_zoom() const { return fYInvZoom; } |
| 56 | float x_inv_inset() const { return fXInvInset; } |
| 57 | float y_inv_inset() const { return fYInvInset; } |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 58 | |
bsalomon@google.com | 422e81a | 2012-10-25 14:11:03 +0000 | [diff] [blame] | 59 | typedef GrGLMagnifierEffect GLEffect; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 60 | |
| 61 | private: |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 62 | GrMagnifierEffect(GrTexture* texture, |
| 63 | float xOffset, |
| 64 | float yOffset, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 65 | float xInvZoom, |
| 66 | float yInvZoom, |
| 67 | float xInvInset, |
| 68 | float yInvInset) |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 69 | : GrSingleTextureEffect(texture, MakeDivByTextureWHMatrix(texture)) |
| 70 | , fXOffset(xOffset) |
| 71 | , fYOffset(yOffset) |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 72 | , fXInvZoom(xInvZoom) |
| 73 | , fYInvZoom(yInvZoom) |
| 74 | , fXInvInset(xInvInset) |
| 75 | , fYInvInset(yInvInset) {} |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 76 | |
bsalomon@google.com | 8a252f7 | 2013-01-22 20:35:13 +0000 | [diff] [blame] | 77 | virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 78 | |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 79 | GR_DECLARE_EFFECT_TEST; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 80 | |
| 81 | float fXOffset; |
| 82 | float fYOffset; |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 83 | float fXInvZoom; |
| 84 | float fYInvZoom; |
| 85 | float fXInvInset; |
| 86 | float fYInvInset; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 87 | |
| 88 | typedef GrSingleTextureEffect INHERITED; |
| 89 | }; |
| 90 | |
| 91 | // For brevity |
| 92 | typedef GrGLUniformManager::UniformHandle UniformHandle; |
| 93 | |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 94 | class GrGLMagnifierEffect : public GrGLEffect { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 95 | public: |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 96 | GrGLMagnifierEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 97 | |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 98 | virtual void emitCode(GrGLShaderBuilder*, |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 99 | const GrDrawEffect&, |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 100 | EffectKey, |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 101 | const char* outputColor, |
| 102 | const char* inputColor, |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 103 | const TransformedCoordsArray&, |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 104 | const TextureSamplerArray&) SK_OVERRIDE; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 105 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 106 | virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 107 | |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 108 | private: |
bsalomon@google.com | 17fc651 | 2012-11-02 21:45:01 +0000 | [diff] [blame] | 109 | UniformHandle fOffsetVar; |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 110 | UniformHandle fInvZoomVar; |
| 111 | UniformHandle fInvInsetVar; |
bsalomon@google.com | 17fc651 | 2012-11-02 21:45:01 +0000 | [diff] [blame] | 112 | |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 113 | typedef GrGLEffect INHERITED; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 114 | }; |
| 115 | |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 116 | GrGLMagnifierEffect::GrGLMagnifierEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
| 117 | : INHERITED(factory) { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 118 | } |
| 119 | |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 120 | void GrGLMagnifierEffect::emitCode(GrGLShaderBuilder* builder, |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 121 | const GrDrawEffect&, |
bsalomon@google.com | 17fc651 | 2012-11-02 21:45:01 +0000 | [diff] [blame] | 122 | EffectKey key, |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 123 | const char* outputColor, |
| 124 | const char* inputColor, |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 125 | const TransformedCoordsArray& coords, |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 126 | const TextureSamplerArray& samplers) { |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 127 | SkString coords2D = builder->ensureFSCoords2D(coords, 0); |
bsalomon@google.com | 47d7a88 | 2012-10-29 12:47:51 +0000 | [diff] [blame] | 128 | fOffsetVar = builder->addUniform( |
commit-bot@chromium.org | 74a3a21 | 2013-08-30 19:43:59 +0000 | [diff] [blame] | 129 | GrGLShaderBuilder::kFragment_Visibility | |
| 130 | GrGLShaderBuilder::kVertex_Visibility, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 131 | kVec2f_GrSLType, "Offset"); |
| 132 | fInvZoomVar = builder->addUniform( |
commit-bot@chromium.org | 74a3a21 | 2013-08-30 19:43:59 +0000 | [diff] [blame] | 133 | GrGLShaderBuilder::kFragment_Visibility | |
| 134 | GrGLShaderBuilder::kVertex_Visibility, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 135 | kVec2f_GrSLType, "InvZoom"); |
| 136 | fInvInsetVar = builder->addUniform( |
commit-bot@chromium.org | 74a3a21 | 2013-08-30 19:43:59 +0000 | [diff] [blame] | 137 | GrGLShaderBuilder::kFragment_Visibility | |
| 138 | GrGLShaderBuilder::kVertex_Visibility, |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 139 | kVec2f_GrSLType, "InvInset"); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 140 | |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 141 | builder->fsCodeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str()); |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 142 | builder->fsCodeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n", |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 143 | builder->getUniformCStr(fOffsetVar), |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 144 | coords2D.c_str(), |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 145 | builder->getUniformCStr(fInvZoomVar)); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 146 | |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 147 | builder->fsCodeAppend("\t\tvec2 delta = min(coord, vec2(1.0, 1.0) - coord);\n"); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 148 | |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 149 | builder->fsCodeAppendf("\t\tdelta = delta * %s;\n", builder->getUniformCStr(fInvInsetVar)); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 150 | |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 151 | builder->fsCodeAppend("\t\tfloat weight = 0.0;\n"); |
| 152 | builder->fsCodeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n"); |
| 153 | builder->fsCodeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n"); |
| 154 | builder->fsCodeAppend("\t\t\tfloat dist = length(delta);\n"); |
| 155 | builder->fsCodeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n"); |
| 156 | builder->fsCodeAppend("\t\t\tweight = min(dist * dist, 1.0);\n"); |
| 157 | builder->fsCodeAppend("\t\t} else {\n"); |
| 158 | builder->fsCodeAppend("\t\t\tvec2 delta_squared = delta * delta;\n"); |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 159 | builder->fsCodeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared.y), 1.0);\n"); |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 160 | builder->fsCodeAppend("\t\t}\n"); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 161 | |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 162 | builder->fsCodeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\n"); |
| 163 | builder->fsCodeAppend("\t\tvec4 output_color = "); |
commit-bot@chromium.org | 74a3a21 | 2013-08-30 19:43:59 +0000 | [diff] [blame] | 164 | builder->fsAppendTextureLookup(samplers[0], "mix_coord"); |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 165 | builder->fsCodeAppend(";\n"); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 166 | |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 167 | builder->fsCodeAppendf("\t\t%s = output_color;", outputColor); |
| 168 | SkString modulate; |
| 169 | GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); |
| 170 | builder->fsCodeAppend(modulate.c_str()); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | void GrGLMagnifierEffect::setData(const GrGLUniformManager& uman, |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 174 | const GrDrawEffect& drawEffect) { |
| 175 | const GrMagnifierEffect& zoom = drawEffect.castEffect<GrMagnifierEffect>(); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 176 | uman.set2f(fOffsetVar, zoom.x_offset(), zoom.y_offset()); |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 177 | uman.set2f(fInvZoomVar, zoom.x_inv_zoom(), zoom.y_inv_zoom()); |
| 178 | uman.set2f(fInvInsetVar, zoom.x_inv_inset(), zoom.y_inv_inset()); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | ///////////////////////////////////////////////////////////////////// |
| 182 | |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 183 | GR_DEFINE_EFFECT_TEST(GrMagnifierEffect); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 184 | |
commit-bot@chromium.org | e0e7cfe | 2013-09-09 20:09:12 +0000 | [diff] [blame] | 185 | GrEffectRef* GrMagnifierEffect::TestCreate(SkRandom* random, |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 186 | GrContext* context, |
bsalomon@google.com | c26d94f | 2013-03-25 18:19:00 +0000 | [diff] [blame] | 187 | const GrDrawTargetCaps&, |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 188 | GrTexture** textures) { |
senorblanco@chromium.org | 1aa6872 | 2013-10-17 19:35:09 +0000 | [diff] [blame] | 189 | GrTexture* texture = textures[0]; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 190 | const int kMaxWidth = 200; |
| 191 | const int kMaxHeight = 200; |
| 192 | const int kMaxInset = 20; |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 193 | uint32_t width = random->nextULessThan(kMaxWidth); |
| 194 | uint32_t height = random->nextULessThan(kMaxHeight); |
| 195 | uint32_t x = random->nextULessThan(kMaxWidth - width); |
| 196 | uint32_t y = random->nextULessThan(kMaxHeight - height); |
senorblanco@chromium.org | 1aa6872 | 2013-10-17 19:35:09 +0000 | [diff] [blame] | 197 | uint32_t inset = random->nextULessThan(kMaxInset); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 198 | |
senorblanco@chromium.org | 1aa6872 | 2013-10-17 19:35:09 +0000 | [diff] [blame] | 199 | GrEffectRef* effect = GrMagnifierEffect::Create( |
| 200 | texture, |
| 201 | (float) width / texture->width(), |
| 202 | (float) height / texture->height(), |
| 203 | texture->width() / (float) x, |
| 204 | texture->height() / (float) y, |
| 205 | (float) inset / texture->width(), |
| 206 | (float) inset / texture->height()); |
commit-bot@chromium.org | 96ae688 | 2013-08-14 12:09:00 +0000 | [diff] [blame] | 207 | SkASSERT(NULL != effect); |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 208 | return effect; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | /////////////////////////////////////////////////////////////////////////////// |
| 212 | |
bsalomon@google.com | 396e61f | 2012-10-25 19:00:29 +0000 | [diff] [blame] | 213 | const GrBackendEffectFactory& GrMagnifierEffect::getFactory() const { |
| 214 | return GrTBackendEffectFactory<GrMagnifierEffect>::getInstance(); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 215 | } |
| 216 | |
bsalomon@google.com | 8a252f7 | 2013-01-22 20:35:13 +0000 | [diff] [blame] | 217 | bool GrMagnifierEffect::onIsEqual(const GrEffect& sBase) const { |
bsalomon@google.com | 6340a41 | 2013-01-22 19:55:59 +0000 | [diff] [blame] | 218 | const GrMagnifierEffect& s = CastEffect<GrMagnifierEffect>(sBase); |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 219 | return (this->texture(0) == s.texture(0) && |
| 220 | this->fXOffset == s.fXOffset && |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 221 | this->fYOffset == s.fYOffset && |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 222 | this->fXInvZoom == s.fXInvZoom && |
| 223 | this->fYInvZoom == s.fYInvZoom && |
| 224 | this->fXInvInset == s.fXInvInset && |
| 225 | this->fYInvInset == s.fYInvInset); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 226 | } |
| 227 | |
bsalomon@google.com | 68b58c9 | 2013-01-17 16:50:08 +0000 | [diff] [blame] | 228 | void GrMagnifierEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { |
| 229 | this->updateConstantColorComponentsForModulation(color, validFlags); |
| 230 | } |
| 231 | |
bsalomon@google.com | 0324570 | 2012-08-13 14:31:30 +0000 | [diff] [blame] | 232 | #endif |
| 233 | |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 234 | //////////////////////////////////////////////////////////////////////////////// |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 235 | SkMagnifierImageFilter::SkMagnifierImageFilter(SkReadBuffer& buffer) |
commit-bot@chromium.org | ce33d60 | 2013-11-25 21:46:31 +0000 | [diff] [blame] | 236 | : INHERITED(1, buffer) { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 237 | float x = buffer.readScalar(); |
| 238 | float y = buffer.readScalar(); |
| 239 | float width = buffer.readScalar(); |
| 240 | float height = buffer.readScalar(); |
| 241 | fSrcRect = SkRect::MakeXYWH(x, y, width, height); |
| 242 | fInset = buffer.readScalar(); |
commit-bot@chromium.org | c0b7e10 | 2013-10-23 17:06:21 +0000 | [diff] [blame] | 243 | |
commit-bot@chromium.org | cd3b15c | 2013-12-04 17:06:49 +0000 | [diff] [blame] | 244 | buffer.validate(SkScalarIsFinite(fInset) && SkIsValidRect(fSrcRect) && |
| 245 | // Negative numbers in src rect are not supported |
| 246 | (fSrcRect.fLeft >= 0) && (fSrcRect.fTop >= 0)); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 247 | } |
| 248 | |
senorblanco@chromium.org | 9f25de7 | 2012-10-10 20:36:13 +0000 | [diff] [blame] | 249 | // FIXME: implement single-input semantics |
commit-bot@chromium.org | cac5fd5 | 2014-03-10 10:51:58 +0000 | [diff] [blame] | 250 | SkMagnifierImageFilter::SkMagnifierImageFilter(const SkRect& srcRect, SkScalar inset) |
senorblanco@chromium.org | 9f25de7 | 2012-10-10 20:36:13 +0000 | [diff] [blame] | 251 | : INHERITED(0), fSrcRect(srcRect), fInset(inset) { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 252 | SkASSERT(srcRect.x() >= 0 && srcRect.y() >= 0 && inset >= 0); |
| 253 | } |
| 254 | |
bsalomon@google.com | 0324570 | 2012-08-13 14:31:30 +0000 | [diff] [blame] | 255 | #if SK_SUPPORT_GPU |
senorblanco@chromium.org | 7938bae | 2013-10-18 20:08:14 +0000 | [diff] [blame] | 256 | bool SkMagnifierImageFilter::asNewEffect(GrEffectRef** effect, GrTexture* texture, const SkMatrix&, const SkIRect&) const { |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 257 | if (effect) { |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 258 | SkScalar yOffset = (texture->origin() == kTopLeft_GrSurfaceOrigin) ? fSrcRect.y() : |
| 259 | (texture->height() - (fSrcRect.y() + fSrcRect.height())); |
| 260 | SkScalar invInset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1; |
senorblanco@chromium.org | d043cce | 2013-04-08 19:43:22 +0000 | [diff] [blame] | 261 | *effect = GrMagnifierEffect::Create(texture, |
| 262 | fSrcRect.x() / texture->width(), |
commit-bot@chromium.org | f642f8c | 2013-10-21 15:59:26 +0000 | [diff] [blame] | 263 | yOffset / texture->height(), |
| 264 | fSrcRect.width() / texture->width(), |
| 265 | fSrcRect.height() / texture->height(), |
| 266 | texture->width() * invInset, |
| 267 | texture->height() * invInset); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 268 | } |
| 269 | return true; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 270 | } |
senorblanco@chromium.org | d043cce | 2013-04-08 19:43:22 +0000 | [diff] [blame] | 271 | #endif |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 272 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 273 | void SkMagnifierImageFilter::flatten(SkWriteBuffer& buffer) const { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 274 | this->INHERITED::flatten(buffer); |
| 275 | buffer.writeScalar(fSrcRect.x()); |
| 276 | buffer.writeScalar(fSrcRect.y()); |
| 277 | buffer.writeScalar(fSrcRect.width()); |
| 278 | buffer.writeScalar(fSrcRect.height()); |
| 279 | buffer.writeScalar(fInset); |
| 280 | } |
| 281 | |
| 282 | bool SkMagnifierImageFilter::onFilterImage(Proxy*, const SkBitmap& src, |
senorblanco@chromium.org | 4cb543d | 2014-03-14 15:44:01 +0000 | [diff] [blame] | 283 | const Context&, SkBitmap* dst, |
commit-bot@chromium.org | ae761f7 | 2014-02-05 22:32:02 +0000 | [diff] [blame] | 284 | SkIPoint* offset) const { |
commit-bot@chromium.org | 149e9a1 | 2014-04-09 20:45:29 +0000 | [diff] [blame^] | 285 | SkASSERT(src.colorType() == kN32_SkColorType); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 286 | SkASSERT(fSrcRect.width() < src.width()); |
| 287 | SkASSERT(fSrcRect.height() < src.height()); |
| 288 | |
commit-bot@chromium.org | 149e9a1 | 2014-04-09 20:45:29 +0000 | [diff] [blame^] | 289 | if ((src.colorType() != kN32_SkColorType) || |
commit-bot@chromium.org | cd3b15c | 2013-12-04 17:06:49 +0000 | [diff] [blame] | 290 | (fSrcRect.width() >= src.width()) || |
| 291 | (fSrcRect.height() >= src.height())) { |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 292 | return false; |
| 293 | } |
| 294 | |
| 295 | SkAutoLockPixels alp(src); |
| 296 | SkASSERT(src.getPixels()); |
| 297 | if (!src.getPixels() || src.width() <= 0 || src.height() <= 0) { |
| 298 | return false; |
| 299 | } |
| 300 | |
commit-bot@chromium.org | cd3b15c | 2013-12-04 17:06:49 +0000 | [diff] [blame] | 301 | dst->setConfig(src.config(), src.width(), src.height()); |
| 302 | dst->allocPixels(); |
| 303 | if (!dst->getPixels()) { |
| 304 | return false; |
| 305 | } |
| 306 | |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 307 | SkScalar inv_inset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 308 | |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 309 | SkScalar inv_x_zoom = fSrcRect.width() / src.width(); |
| 310 | SkScalar inv_y_zoom = fSrcRect.height() / src.height(); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 311 | |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 312 | SkColor* sptr = src.getAddr32(0, 0); |
| 313 | SkColor* dptr = dst->getAddr32(0, 0); |
| 314 | int width = src.width(), height = src.height(); |
| 315 | for (int y = 0; y < height; ++y) { |
| 316 | for (int x = 0; x < width; ++x) { |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 317 | SkScalar x_dist = SkMin32(x, width - x - 1) * inv_inset; |
| 318 | SkScalar y_dist = SkMin32(y, height - y - 1) * inv_inset; |
| 319 | SkScalar weight = 0; |
| 320 | |
| 321 | static const SkScalar kScalar2 = SkScalar(2); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 322 | |
| 323 | // To create a smooth curve at the corners, we need to work on |
| 324 | // a square twice the size of the inset. |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 325 | if (x_dist < kScalar2 && y_dist < kScalar2) { |
| 326 | x_dist = kScalar2 - x_dist; |
| 327 | y_dist = kScalar2 - y_dist; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 328 | |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 329 | SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) + |
| 330 | SkScalarSquare(y_dist)); |
| 331 | dist = SkMaxScalar(kScalar2 - dist, 0); |
| 332 | weight = SkMinScalar(SkScalarSquare(dist), SK_Scalar1); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 333 | } else { |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 334 | SkScalar sqDist = SkMinScalar(SkScalarSquare(x_dist), |
| 335 | SkScalarSquare(y_dist)); |
| 336 | weight = SkMinScalar(sqDist, SK_Scalar1); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 337 | } |
| 338 | |
robertphillips@google.com | 5d8d186 | 2012-08-15 14:36:41 +0000 | [diff] [blame] | 339 | SkScalar x_interp = SkScalarMul(weight, (fSrcRect.x() + x * inv_x_zoom)) + |
| 340 | (SK_Scalar1 - weight) * x; |
| 341 | SkScalar y_interp = SkScalarMul(weight, (fSrcRect.y() + y * inv_y_zoom)) + |
| 342 | (SK_Scalar1 - weight) * y; |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 343 | |
commit-bot@chromium.org | cd3b15c | 2013-12-04 17:06:49 +0000 | [diff] [blame] | 344 | int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1); |
| 345 | int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1); |
bsalomon@google.com | 82aa748 | 2012-08-13 14:22:17 +0000 | [diff] [blame] | 346 | |
| 347 | *dptr = sptr[y_val * width + x_val]; |
| 348 | dptr++; |
| 349 | } |
| 350 | } |
| 351 | return true; |
| 352 | } |