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Romain Guy06f96e22010-07-30 19:18:16 -07001/*
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
27namespace android {
28namespace uirenderer {
29
30///////////////////////////////////////////////////////////////////////////////
31// Support
32///////////////////////////////////////////////////////////////////////////////
33
34static const GLenum gTextureUnitsMap[] = {
35 GL_TEXTURE0,
36 GL_TEXTURE1,
37 GL_TEXTURE2
38};
39
40static 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
50SkiaShader::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
55SkiaShader::~SkiaShader() {
56}
57
58void SkiaShader::describe(ProgramDescription& description, const Extensions& extensions) {
59}
60
61void SkiaShader::setupProgram(Program* program, const mat4& modelView, const Snapshot& snapshot,
62 GLuint* textureUnit) {
63}
64
65void 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
76SkiaBitmapShader::SkiaBitmapShader(SkBitmap* bitmap, SkShader* key, SkShader::TileMode tileX,
77 SkShader::TileMode tileY, SkMatrix* matrix, bool blend):
Romain Guy9cccc2b2010-08-07 23:46:15 -070078 SkiaShader(kBitmap, key, tileX, tileY, matrix, blend), mBitmap(bitmap), mTexture(NULL) {
Romain Guy06f96e22010-07-30 19:18:16 -070079}
80
Romain Guy06f96e22010-07-30 19:18:16 -070081void SkiaBitmapShader::describe(ProgramDescription& description, const Extensions& extensions) {
82 const Texture* texture = mTextureCache->get(mBitmap);
Romain Guy9cccc2b2010-08-07 23:46:15 -070083 if (!texture) return;
84 mTexture = texture;
Romain Guy06f96e22010-07-30 19:18:16 -070085
86 const float width = texture->width;
87 const float height = texture->height;
88
89 description.hasBitmap = true;
90 // The driver does not support non-power of two mirrored/repeated
91 // textures, so do it ourselves
Romain Guy61c8c9c2010-08-09 20:48:09 -070092 if (!extensions.hasNPot() && (!isPowerOfTwo(width) || !isPowerOfTwo(height)) &&
93 (mTileX != SkShader::kClamp_TileMode || mTileY != SkShader::kClamp_TileMode)) {
Romain Guy06f96e22010-07-30 19:18:16 -070094 description.isBitmapNpot = true;
95 description.bitmapWrapS = gTileModes[mTileX];
96 description.bitmapWrapT = gTileModes[mTileY];
97 }
98}
99
100void SkiaBitmapShader::setupProgram(Program* program, const mat4& modelView,
101 const Snapshot& snapshot, GLuint* textureUnit) {
102 GLuint textureSlot = (*textureUnit)++;
103 glActiveTexture(gTextureUnitsMap[textureSlot]);
Romain Guy9cccc2b2010-08-07 23:46:15 -0700104
105 const Texture* texture = mTexture;
106 mTexture = NULL;
107 if (!texture) return;
108 const AutoTexture autoCleanup(texture);
Romain Guy06f96e22010-07-30 19:18:16 -0700109
110 const float width = texture->width;
111 const float height = texture->height;
112
113 mat4 textureTransform;
114 if (mMatrix) {
115 SkMatrix inverse;
116 mMatrix->invert(&inverse);
117 textureTransform.load(inverse);
118 textureTransform.multiply(modelView);
119 } else {
120 textureTransform.load(modelView);
121 }
122
123 // Uniforms
124 bindTexture(texture->id, gTileModes[mTileX], gTileModes[mTileY], textureSlot);
125 glUniform1i(program->getUniform("bitmapSampler"), textureSlot);
126 glUniformMatrix4fv(program->getUniform("textureTransform"), 1,
127 GL_FALSE, &textureTransform.data[0]);
128 glUniform2f(program->getUniform("textureDimension"), 1.0f / width, 1.0f / height);
129}
130
Romain Guy759ea802010-09-16 20:49:46 -0700131void SkiaBitmapShader::updateTransforms(Program* program, const mat4& modelView,
132 const Snapshot& snapshot) {
133 mat4 textureTransform;
134 if (mMatrix) {
135 SkMatrix inverse;
136 mMatrix->invert(&inverse);
137 textureTransform.load(inverse);
138 textureTransform.multiply(modelView);
139 } else {
140 textureTransform.load(modelView);
141 }
142
143 glUniformMatrix4fv(program->getUniform("textureTransform"), 1,
144 GL_FALSE, &textureTransform.data[0]);
145}
146
Romain Guy06f96e22010-07-30 19:18:16 -0700147///////////////////////////////////////////////////////////////////////////////
148// Linear gradient shader
149///////////////////////////////////////////////////////////////////////////////
150
151SkiaLinearGradientShader::SkiaLinearGradientShader(float* bounds, uint32_t* colors,
152 float* positions, int count, SkShader* key, SkShader::TileMode tileMode,
153 SkMatrix* matrix, bool blend):
154 SkiaShader(kLinearGradient, key, tileMode, tileMode, matrix, blend),
155 mBounds(bounds), mColors(colors), mPositions(positions), mCount(count) {
156}
157
158SkiaLinearGradientShader::~SkiaLinearGradientShader() {
Romain Guy25ee0372010-08-06 10:57:58 -0700159 delete[] mBounds;
160 delete[] mColors;
161 delete[] mPositions;
Romain Guy06f96e22010-07-30 19:18:16 -0700162}
163
164void SkiaLinearGradientShader::describe(ProgramDescription& description,
165 const Extensions& extensions) {
166 description.hasGradient = true;
Romain Guyee916f12010-09-20 17:53:08 -0700167 description.gradientType = ProgramDescription::kGradientLinear;
Romain Guy06f96e22010-07-30 19:18:16 -0700168}
169
170void SkiaLinearGradientShader::setupProgram(Program* program, const mat4& modelView,
171 const Snapshot& snapshot, GLuint* textureUnit) {
172 GLuint textureSlot = (*textureUnit)++;
173 glActiveTexture(gTextureUnitsMap[textureSlot]);
174
175 Texture* texture = mGradientCache->get(mKey);
176 if (!texture) {
Romain Guyee916f12010-09-20 17:53:08 -0700177 texture = mGradientCache->addLinearGradient(mKey, mColors, mPositions, mCount, mTileX);
Romain Guy06f96e22010-07-30 19:18:16 -0700178 }
179
180 Rect start(mBounds[0], mBounds[1], mBounds[2], mBounds[3]);
181 if (mMatrix) {
182 mat4 shaderMatrix(*mMatrix);
Romain Guy0ba681b2010-08-12 15:37:00 -0700183 shaderMatrix.mapPoint(start.left, start.top);
184 shaderMatrix.mapPoint(start.right, start.bottom);
Romain Guy06f96e22010-07-30 19:18:16 -0700185 }
Romain Guy8aef54f2010-09-01 15:13:49 -0700186 snapshot.transform->mapRect(start);
Romain Guy06f96e22010-07-30 19:18:16 -0700187
188 const float gradientX = start.right - start.left;
189 const float gradientY = start.bottom - start.top;
190
Romain Guy8aef54f2010-09-01 15:13:49 -0700191 mat4 screenSpace(*snapshot.transform);
Romain Guy06f96e22010-07-30 19:18:16 -0700192 screenSpace.multiply(modelView);
193
194 // Uniforms
195 bindTexture(texture->id, gTileModes[mTileX], gTileModes[mTileY], textureSlot);
196 glUniform1i(program->getUniform("gradientSampler"), textureSlot);
197 glUniform2f(program->getUniform("gradientStart"), start.left, start.top);
198 glUniform2f(program->getUniform("gradient"), gradientX, gradientY);
199 glUniform1f(program->getUniform("gradientLength"),
200 1.0f / (gradientX * gradientX + gradientY * gradientY));
201 glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]);
202}
203
Romain Guy759ea802010-09-16 20:49:46 -0700204void SkiaLinearGradientShader::updateTransforms(Program* program, const mat4& modelView,
205 const Snapshot& snapshot) {
206 mat4 screenSpace(*snapshot.transform);
207 screenSpace.multiply(modelView);
208 glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]);
209}
210
Romain Guy06f96e22010-07-30 19:18:16 -0700211///////////////////////////////////////////////////////////////////////////////
Romain Guyddb80be2010-09-20 19:04:33 -0700212// Circular gradient shader
213///////////////////////////////////////////////////////////////////////////////
214
215SkiaCircularGradientShader::SkiaCircularGradientShader(float x, float y, float radius,
216 uint32_t* colors, float* positions, int count, SkShader* key, SkShader::TileMode tileMode,
217 SkMatrix* matrix, bool blend):
218 SkiaSweepGradientShader(kCircularGradient, x, y, colors, positions, count, key,
219 tileMode, matrix, blend),
220 mRadius(radius) {
221}
222
223void SkiaCircularGradientShader::describe(ProgramDescription& description,
224 const Extensions& extensions) {
225 description.hasGradient = true;
226 description.gradientType = ProgramDescription::kGradientCircular;
227}
228
229void SkiaCircularGradientShader::setupProgram(Program* program, const mat4& modelView,
230 const Snapshot& snapshot, GLuint* textureUnit) {
231 SkiaSweepGradientShader::setupProgram(program, modelView, snapshot, textureUnit);
232 glUniform1f(program->getUniform("gradientRadius"), 1.0f / mRadius);
233}
234
235///////////////////////////////////////////////////////////////////////////////
Romain Guyee916f12010-09-20 17:53:08 -0700236// Sweep gradient shader
237///////////////////////////////////////////////////////////////////////////////
238
239SkiaSweepGradientShader::SkiaSweepGradientShader(float x, float y, uint32_t* colors,
240 float* positions, int count, SkShader* key, SkMatrix* matrix, bool blend):
241 SkiaShader(kSweepGradient, key, SkShader::kClamp_TileMode,
242 SkShader::kClamp_TileMode, matrix, blend),
243 mX(x), mY(y), mColors(colors), mPositions(positions), mCount(count) {
244}
245
Romain Guyddb80be2010-09-20 19:04:33 -0700246SkiaSweepGradientShader::SkiaSweepGradientShader(Type type, float x, float y, uint32_t* colors,
247 float* positions, int count, SkShader* key, SkShader::TileMode tileMode,
248 SkMatrix* matrix, bool blend):
249 SkiaShader(type, key, tileMode, tileMode, matrix, blend),
250 mX(x), mY(y), mColors(colors), mPositions(positions), mCount(count) {
251}
252
Romain Guyee916f12010-09-20 17:53:08 -0700253SkiaSweepGradientShader::~SkiaSweepGradientShader() {
254 delete[] mColors;
255 delete[] mPositions;
256}
257
258void SkiaSweepGradientShader::describe(ProgramDescription& description,
259 const Extensions& extensions) {
260 description.hasGradient = true;
261 description.gradientType = ProgramDescription::kGradientSweep;
262}
263
264void SkiaSweepGradientShader::setupProgram(Program* program, const mat4& modelView,
265 const Snapshot& snapshot, GLuint* textureUnit) {
266 GLuint textureSlot = (*textureUnit)++;
267 glActiveTexture(gTextureUnitsMap[textureSlot]);
268
269 Texture* texture = mGradientCache->get(mKey);
270 if (!texture) {
271 texture = mGradientCache->addLinearGradient(mKey, mColors, mPositions, mCount);
272 }
273
274 float left = mX;
275 float top = mY;
276
Romain Guyddb80be2010-09-20 19:04:33 -0700277 mat4 shaderMatrix;
Romain Guyee916f12010-09-20 17:53:08 -0700278 if (mMatrix) {
Romain Guyddb80be2010-09-20 19:04:33 -0700279 shaderMatrix.load(*mMatrix);
Romain Guyee916f12010-09-20 17:53:08 -0700280 shaderMatrix.mapPoint(left, top);
281 }
Romain Guyddb80be2010-09-20 19:04:33 -0700282
283 mat4 copy(shaderMatrix);
284 shaderMatrix.loadInverse(copy);
285
Romain Guyee916f12010-09-20 17:53:08 -0700286 snapshot.transform->mapPoint(left, top);
287
288 mat4 screenSpace(*snapshot.transform);
289 screenSpace.multiply(modelView);
290
291 // Uniforms
292 bindTexture(texture->id, gTileModes[mTileX], gTileModes[mTileY], textureSlot);
293 glUniform1i(program->getUniform("gradientSampler"), textureSlot);
Romain Guyddb80be2010-09-20 19:04:33 -0700294 glUniformMatrix4fv(program->getUniform("gradientMatrix"), 1, GL_FALSE, &shaderMatrix.data[0]);
Romain Guyee916f12010-09-20 17:53:08 -0700295 glUniform2f(program->getUniform("gradientStart"), left, top);
296 glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]);
297}
298
299void SkiaSweepGradientShader::updateTransforms(Program* program, const mat4& modelView,
300 const Snapshot& snapshot) {
301 mat4 screenSpace(*snapshot.transform);
302 screenSpace.multiply(modelView);
303 glUniformMatrix4fv(program->getUniform("screenSpace"), 1, GL_FALSE, &screenSpace.data[0]);
304}
305
306///////////////////////////////////////////////////////////////////////////////
Romain Guy06f96e22010-07-30 19:18:16 -0700307// Compose shader
308///////////////////////////////////////////////////////////////////////////////
309
310SkiaComposeShader::SkiaComposeShader(SkiaShader* first, SkiaShader* second,
311 SkXfermode::Mode mode, SkShader* key):
312 SkiaShader(kCompose, key, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
313 NULL, first->blend() || second->blend()), mFirst(first), mSecond(second), mMode(mode) {
314}
315
Romain Guy06f96e22010-07-30 19:18:16 -0700316void SkiaComposeShader::set(TextureCache* textureCache, GradientCache* gradientCache) {
317 SkiaShader::set(textureCache, gradientCache);
318 mFirst->set(textureCache, gradientCache);
319 mSecond->set(textureCache, gradientCache);
320}
321
322void SkiaComposeShader::describe(ProgramDescription& description, const Extensions& extensions) {
323 mFirst->describe(description, extensions);
324 mSecond->describe(description, extensions);
325 if (mFirst->type() == kBitmap) {
326 description.isBitmapFirst = true;
327 }
328 description.shadersMode = mMode;
329}
330
331void SkiaComposeShader::setupProgram(Program* program, const mat4& modelView,
332 const Snapshot& snapshot, GLuint* textureUnit) {
333 mFirst->setupProgram(program, modelView, snapshot, textureUnit);
334 mSecond->setupProgram(program, modelView, snapshot, textureUnit);
335}
336
337}; // namespace uirenderer
338}; // namespace android