1 /*
2 * Copyright 2013 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 ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19 #include <GLES2/gl2.h>
20 #include <GLES2/gl2ext.h>
21
22 #include <ui/Rect.h>
23
24 #include <utils/String8.h>
25 #include <utils/Trace.h>
26
27 #include <cutils/compiler.h>
28 #include <gui/ISurfaceComposer.h>
29 #include <math.h>
30
31 #include "GLES20RenderEngine.h"
32 #include "Program.h"
33 #include "ProgramCache.h"
34 #include "Description.h"
35 #include "Mesh.h"
36 #include "Texture.h"
37
38 // ---------------------------------------------------------------------------
39 namespace android {
40 // ---------------------------------------------------------------------------
41
GLES20RenderEngine()42 GLES20RenderEngine::GLES20RenderEngine() :
43 mVpWidth(0), mVpHeight(0) {
44
45 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
46 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
47
48 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
49 glPixelStorei(GL_PACK_ALIGNMENT, 4);
50
51 const uint16_t protTexData[] = { 0 };
52 glGenTextures(1, &mProtectedTexName);
53 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
54 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
55 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
56 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
57 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
58 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
59 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
60
61 //mColorBlindnessCorrection = M;
62 }
63
~GLES20RenderEngine()64 GLES20RenderEngine::~GLES20RenderEngine() {
65 }
66
67
getMaxTextureSize() const68 size_t GLES20RenderEngine::getMaxTextureSize() const {
69 return mMaxTextureSize;
70 }
71
getMaxViewportDims() const72 size_t GLES20RenderEngine::getMaxViewportDims() const {
73 return
74 mMaxViewportDims[0] < mMaxViewportDims[1] ?
75 mMaxViewportDims[0] : mMaxViewportDims[1];
76 }
77
setViewportAndProjection(size_t vpw,size_t vph,Rect sourceCrop,size_t hwh,bool yswap,Transform::orientation_flags rotation)78 void GLES20RenderEngine::setViewportAndProjection(
79 size_t vpw, size_t vph, Rect sourceCrop, size_t hwh, bool yswap,
80 Transform::orientation_flags rotation) {
81
82 size_t l = sourceCrop.left;
83 size_t r = sourceCrop.right;
84
85 // In GL, (0, 0) is the bottom-left corner, so flip y coordinates
86 size_t t = hwh - sourceCrop.top;
87 size_t b = hwh - sourceCrop.bottom;
88
89 mat4 m;
90 if (yswap) {
91 m = mat4::ortho(l, r, t, b, 0, 1);
92 } else {
93 m = mat4::ortho(l, r, b, t, 0, 1);
94 }
95
96 // Apply custom rotation to the projection.
97 float rot90InRadians = 2.0f * static_cast<float>(M_PI) / 4.0f;
98 switch (rotation) {
99 case Transform::ROT_0:
100 break;
101 case Transform::ROT_90:
102 m = mat4::rotate(rot90InRadians, vec3(0,0,1)) * m;
103 break;
104 case Transform::ROT_180:
105 m = mat4::rotate(rot90InRadians * 2.0f, vec3(0,0,1)) * m;
106 break;
107 case Transform::ROT_270:
108 m = mat4::rotate(rot90InRadians * 3.0f, vec3(0,0,1)) * m;
109 break;
110 default:
111 break;
112 }
113
114 glViewport(0, 0, vpw, vph);
115 mState.setProjectionMatrix(m);
116 mVpWidth = vpw;
117 mVpHeight = vph;
118 }
119
120 #ifdef USE_HWC2
setupLayerBlending(bool premultipliedAlpha,bool opaque,float alpha)121 void GLES20RenderEngine::setupLayerBlending(bool premultipliedAlpha,
122 bool opaque, float alpha) {
123 #else
124 void GLES20RenderEngine::setupLayerBlending(
125 bool premultipliedAlpha, bool opaque, int alpha) {
126 #endif
127
128 mState.setPremultipliedAlpha(premultipliedAlpha);
129 mState.setOpaque(opaque);
130 #ifdef USE_HWC2
131 mState.setPlaneAlpha(alpha);
132
133 if (alpha < 1.0f || !opaque) {
134 #else
135 mState.setPlaneAlpha(alpha / 255.0f);
136
137 if (alpha < 0xFF || !opaque) {
138 #endif
139 glEnable(GL_BLEND);
140 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
141 } else {
142 glDisable(GL_BLEND);
143 }
144 }
145
146 #ifdef USE_HWC2
147 void GLES20RenderEngine::setupDimLayerBlending(float alpha) {
148 #else
149 void GLES20RenderEngine::setupDimLayerBlending(int alpha) {
150 #endif
151 mState.setPlaneAlpha(1.0f);
152 mState.setPremultipliedAlpha(true);
153 mState.setOpaque(false);
154 #ifdef USE_HWC2
155 mState.setColor(0, 0, 0, alpha);
156 #else
157 mState.setColor(0, 0, 0, alpha/255.0f);
158 #endif
159 mState.disableTexture();
160
161 #ifdef USE_HWC2
162 if (alpha == 1.0f) {
163 #else
164 if (alpha == 0xFF) {
165 #endif
166 glDisable(GL_BLEND);
167 } else {
168 glEnable(GL_BLEND);
169 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
170 }
171 }
172
173 void GLES20RenderEngine::setupLayerTexturing(const Texture& texture) {
174 GLuint target = texture.getTextureTarget();
175 glBindTexture(target, texture.getTextureName());
176 GLenum filter = GL_NEAREST;
177 if (texture.getFiltering()) {
178 filter = GL_LINEAR;
179 }
180 glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
181 glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
182 glTexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
183 glTexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
184
185 mState.setTexture(texture);
186 }
187
188 void GLES20RenderEngine::setupLayerBlackedOut() {
189 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
190 Texture texture(Texture::TEXTURE_2D, mProtectedTexName);
191 texture.setDimensions(1, 1); // FIXME: we should get that from somewhere
192 mState.setTexture(texture);
193 }
194
195 mat4 GLES20RenderEngine::setupColorTransform(const mat4& colorTransform) {
196 mat4 oldTransform = mState.getColorMatrix();
197 mState.setColorMatrix(colorTransform);
198 return oldTransform;
199 }
200
201 void GLES20RenderEngine::disableTexturing() {
202 mState.disableTexture();
203 }
204
205 void GLES20RenderEngine::disableBlending() {
206 glDisable(GL_BLEND);
207 }
208
209
210 void GLES20RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
211 uint32_t* texName, uint32_t* fbName, uint32_t* status) {
212 GLuint tname, name;
213 // turn our EGLImage into a texture
214 glGenTextures(1, &tname);
215 glBindTexture(GL_TEXTURE_2D, tname);
216 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
217
218 // create a Framebuffer Object to render into
219 glGenFramebuffers(1, &name);
220 glBindFramebuffer(GL_FRAMEBUFFER, name);
221 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tname, 0);
222
223 *status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
224 *texName = tname;
225 *fbName = name;
226 }
227
228 void GLES20RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
229 glBindFramebuffer(GL_FRAMEBUFFER, 0);
230 glDeleteFramebuffers(1, &fbName);
231 glDeleteTextures(1, &texName);
232 }
233
234 void GLES20RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
235 mState.setPlaneAlpha(1.0f);
236 mState.setPremultipliedAlpha(true);
237 mState.setOpaque(false);
238 mState.setColor(r, g, b, a);
239 mState.disableTexture();
240 glDisable(GL_BLEND);
241 }
242
243 void GLES20RenderEngine::drawMesh(const Mesh& mesh) {
244
245 ProgramCache::getInstance().useProgram(mState);
246
247 if (mesh.getTexCoordsSize()) {
248 glEnableVertexAttribArray(Program::texCoords);
249 glVertexAttribPointer(Program::texCoords,
250 mesh.getTexCoordsSize(),
251 GL_FLOAT, GL_FALSE,
252 mesh.getByteStride(),
253 mesh.getTexCoords());
254 }
255
256 glVertexAttribPointer(Program::position,
257 mesh.getVertexSize(),
258 GL_FLOAT, GL_FALSE,
259 mesh.getByteStride(),
260 mesh.getPositions());
261
262 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
263
264 if (mesh.getTexCoordsSize()) {
265 glDisableVertexAttribArray(Program::texCoords);
266 }
267 }
268
269 void GLES20RenderEngine::dump(String8& result) {
270 RenderEngine::dump(result);
271 }
272
273 // ---------------------------------------------------------------------------
274 }; // namespace android
275 // ---------------------------------------------------------------------------
276
277 #if defined(__gl_h_)
278 #error "don't include gl/gl.h in this file"
279 #endif
280