Romain Guy | 06f96e2 | 2010-07-30 19:18:16 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "OpenGLRenderer" |
| 18 | |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include <SkMatrix.h> |
| 22 | |
| 23 | #include "SkiaShader.h" |
| 24 | #include "Texture.h" |
| 25 | #include "Matrix.h" |
| 26 | |
| 27 | namespace android { |
| 28 | namespace uirenderer { |
| 29 | |
| 30 | /////////////////////////////////////////////////////////////////////////////// |
| 31 | // Support |
| 32 | /////////////////////////////////////////////////////////////////////////////// |
| 33 | |
| 34 | static const GLenum gTextureUnitsMap[] = { |
| 35 | GL_TEXTURE0, |
| 36 | GL_TEXTURE1, |
| 37 | GL_TEXTURE2 |
| 38 | }; |
| 39 | |
| 40 | static const GLint gTileModes[] = { |
| 41 | GL_CLAMP_TO_EDGE, // == SkShader::kClamp_TileMode |
| 42 | GL_REPEAT, // == SkShader::kRepeat_Mode |
| 43 | GL_MIRRORED_REPEAT // == SkShader::kMirror_TileMode |
| 44 | }; |
| 45 | |
| 46 | /////////////////////////////////////////////////////////////////////////////// |
| 47 | // Base shader |
| 48 | /////////////////////////////////////////////////////////////////////////////// |
| 49 | |
| 50 | SkiaShader::SkiaShader(Type type, SkShader* key, SkShader::TileMode tileX, |
| 51 | SkShader::TileMode tileY, SkMatrix* matrix, bool blend): |
| 52 | mType(type), mKey(key), mTileX(tileX), mTileY(tileY), mMatrix(matrix), mBlend(blend) { |
| 53 | } |
| 54 | |
| 55 | SkiaShader::~SkiaShader() { |
| 56 | } |
| 57 | |
| 58 | void SkiaShader::describe(ProgramDescription& description, const Extensions& extensions) { |
| 59 | } |
| 60 | |
| 61 | void SkiaShader::setupProgram(Program* program, const mat4& modelView, const Snapshot& snapshot, |
| 62 | GLuint* textureUnit) { |
| 63 | } |
| 64 | |
| 65 | void SkiaShader::bindTexture(GLuint texture, GLenum wrapS, GLenum wrapT, GLuint textureUnit) { |
| 66 | glActiveTexture(gTextureUnitsMap[textureUnit]); |
| 67 | glBindTexture(GL_TEXTURE_2D, texture); |
| 68 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapS); |
| 69 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapT); |
| 70 | } |
| 71 | |
| 72 | /////////////////////////////////////////////////////////////////////////////// |
| 73 | // Bitmap shader |
| 74 | /////////////////////////////////////////////////////////////////////////////// |
| 75 | |
| 76 | SkiaBitmapShader::SkiaBitmapShader(SkBitmap* bitmap, SkShader* key, SkShader::TileMode tileX, |
| 77 | SkShader::TileMode tileY, SkMatrix* matrix, bool blend): |
| 78 | SkiaShader(kBitmap, key, tileX, tileY, matrix, blend), mBitmap(bitmap) { |
| 79 | } |
| 80 | |
| 81 | SkiaBitmapShader::~SkiaBitmapShader() { |
| 82 | } |
| 83 | |
| 84 | void SkiaBitmapShader::describe(ProgramDescription& description, const Extensions& extensions) { |
| 85 | const Texture* texture = mTextureCache->get(mBitmap); |
| 86 | |
| 87 | const float width = texture->width; |
| 88 | const float height = texture->height; |
| 89 | |
| 90 | description.hasBitmap = true; |
| 91 | // The driver does not support non-power of two mirrored/repeated |
| 92 | // textures, so do it ourselves |
| 93 | if (!extensions.hasNPot() && !isPowerOfTwo(width) && !isPowerOfTwo(height)) { |
| 94 | description.isBitmapNpot = true; |
| 95 | description.bitmapWrapS = gTileModes[mTileX]; |
| 96 | description.bitmapWrapT = gTileModes[mTileY]; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | void SkiaBitmapShader::setupProgram(Program* program, const mat4& modelView, |
| 101 | const Snapshot& snapshot, GLuint* textureUnit) { |
| 102 | GLuint textureSlot = (*textureUnit)++; |
| 103 | glActiveTexture(gTextureUnitsMap[textureSlot]); |
| 104 | const Texture* texture = mTextureCache->get(mBitmap); |
| 105 | |
| 106 | const float width = texture->width; |
| 107 | const float height = texture->height; |
| 108 | |
| 109 | mat4 textureTransform; |
| 110 | if (mMatrix) { |
| 111 | SkMatrix inverse; |
| 112 | mMatrix->invert(&inverse); |
| 113 | textureTransform.load(inverse); |
| 114 | textureTransform.multiply(modelView); |
| 115 | } else { |
| 116 | textureTransform.load(modelView); |
| 117 | } |
| 118 | |
| 119 | // Uniforms |
| 120 | bindTexture(texture->id, gTileModes[mTileX], gTileModes[mTileY], textureSlot); |
| 121 | glUniform1i(program->getUniform("bitmapSampler"), textureSlot); |
| 122 | glUniformMatrix4fv(program->getUniform("textureTransform"), 1, |
| 123 | GL_FALSE, &textureTransform.data[0]); |
| 124 | glUniform2f(program->getUniform("textureDimension"), 1.0f / width, 1.0f / height); |
| 125 | } |
| 126 | |
| 127 | /////////////////////////////////////////////////////////////////////////////// |
| 128 | // Linear gradient shader |
| 129 | /////////////////////////////////////////////////////////////////////////////// |
| 130 | |
| 131 | SkiaLinearGradientShader::SkiaLinearGradientShader(float* bounds, uint32_t* colors, |
| 132 | float* positions, int count, SkShader* key, SkShader::TileMode tileMode, |
| 133 | SkMatrix* matrix, bool blend): |
| 134 | SkiaShader(kLinearGradient, key, tileMode, tileMode, matrix, blend), |
| 135 | mBounds(bounds), mColors(colors), mPositions(positions), mCount(count) { |
| 136 | } |
| 137 | |
| 138 | SkiaLinearGradientShader::~SkiaLinearGradientShader() { |
| 139 | delete mBounds; |
| 140 | delete mColors; |
| 141 | delete mPositions; |
| 142 | } |
| 143 | |
| 144 | void SkiaLinearGradientShader::describe(ProgramDescription& description, |
| 145 | const Extensions& extensions) { |
| 146 | description.hasGradient = true; |
| 147 | } |
| 148 | |
| 149 | void SkiaLinearGradientShader::setupProgram(Program* program, const mat4& modelView, |
| 150 | const Snapshot& snapshot, GLuint* textureUnit) { |
| 151 | GLuint textureSlot = (*textureUnit)++; |
| 152 | glActiveTexture(gTextureUnitsMap[textureSlot]); |
| 153 | |
| 154 | Texture* texture = mGradientCache->get(mKey); |
| 155 | if (!texture) { |
| 156 | texture = mGradientCache->addLinearGradient(mKey, mBounds, mColors, mPositions, |
| 157 | mCount, mTileX); |
| 158 | } |
| 159 | |
| 160 | Rect start(mBounds[0], mBounds[1], mBounds[2], mBounds[3]); |
| 161 | if (mMatrix) { |
| 162 | mat4 shaderMatrix(*mMatrix); |
| 163 | shaderMatrix.mapRect(start); |
| 164 | } |
| 165 | snapshot.transform.mapRect(start); |
| 166 | |
| 167 | const float gradientX = start.right - start.left; |
| 168 | const float gradientY = start.bottom - start.top; |
| 169 | |
| 170 | mat4 screenSpace(snapshot.transform); |
| 171 | screenSpace.multiply(modelView); |
| 172 | |
| 173 | // Uniforms |
| 174 | bindTexture(texture->id, gTileModes[mTileX], gTileModes[mTileY], textureSlot); |
| 175 | glUniform1i(program->getUniform("gradientSampler"), textureSlot); |
| 176 | glUniform2f(program->getUniform("gradientStart"), start.left, start.top); |
| 177 | glUniform2f(program->getUniform("gradient"), gradientX, gradientY); |
| 178 | glUniform1f(program->getUniform("gradientLength"), |
| 179 | 1.0f / (gradientX * gradientX + gradientY * gradientY)); |
| 180 | glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]); |
| 181 | } |
| 182 | |
| 183 | /////////////////////////////////////////////////////////////////////////////// |
| 184 | // Compose shader |
| 185 | /////////////////////////////////////////////////////////////////////////////// |
| 186 | |
| 187 | SkiaComposeShader::SkiaComposeShader(SkiaShader* first, SkiaShader* second, |
| 188 | SkXfermode::Mode mode, SkShader* key): |
| 189 | SkiaShader(kCompose, key, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, |
| 190 | NULL, first->blend() || second->blend()), mFirst(first), mSecond(second), mMode(mode) { |
| 191 | } |
| 192 | |
| 193 | SkiaComposeShader::~SkiaComposeShader() { |
| 194 | delete mFirst; |
| 195 | delete mSecond; |
| 196 | } |
| 197 | |
| 198 | void SkiaComposeShader::set(TextureCache* textureCache, GradientCache* gradientCache) { |
| 199 | SkiaShader::set(textureCache, gradientCache); |
| 200 | mFirst->set(textureCache, gradientCache); |
| 201 | mSecond->set(textureCache, gradientCache); |
| 202 | } |
| 203 | |
| 204 | void SkiaComposeShader::describe(ProgramDescription& description, const Extensions& extensions) { |
| 205 | mFirst->describe(description, extensions); |
| 206 | mSecond->describe(description, extensions); |
| 207 | if (mFirst->type() == kBitmap) { |
| 208 | description.isBitmapFirst = true; |
| 209 | } |
| 210 | description.shadersMode = mMode; |
| 211 | } |
| 212 | |
| 213 | void SkiaComposeShader::setupProgram(Program* program, const mat4& modelView, |
| 214 | const Snapshot& snapshot, GLuint* textureUnit) { |
| 215 | mFirst->setupProgram(program, modelView, snapshot, textureUnit); |
| 216 | mSecond->setupProgram(program, modelView, snapshot, textureUnit); |
| 217 | } |
| 218 | |
| 219 | }; // namespace uirenderer |
| 220 | }; // namespace android |