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 #include <GLES/gl.h>
18 #include <GLES/glext.h>
19
20 #include <ui/Rect.h>
21
22 #include <utils/String8.h>
23 #include <cutils/compiler.h>
24 #include <gui/ISurfaceComposer.h>
25
26 #include "GLES11RenderEngine.h"
27 #include "Mesh.h"
28 #include "Texture.h"
29
30 // ---------------------------------------------------------------------------
31 namespace android {
32 // ---------------------------------------------------------------------------
33
GLES11RenderEngine()34 GLES11RenderEngine::GLES11RenderEngine() {
35
36 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
37 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
38
39 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
40 glPixelStorei(GL_PACK_ALIGNMENT, 4);
41 glEnableClientState(GL_VERTEX_ARRAY);
42 glShadeModel(GL_FLAT);
43 glDisable(GL_DITHER);
44 glDisable(GL_CULL_FACE);
45
46 const uint16_t protTexData[] = { 0 };
47 glGenTextures(1, &mProtectedTexName);
48 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
49 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
50 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
51 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
52 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
53 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
54 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
55 }
56
~GLES11RenderEngine()57 GLES11RenderEngine::~GLES11RenderEngine() {
58 }
59
60
getMaxTextureSize() const61 size_t GLES11RenderEngine::getMaxTextureSize() const {
62 return mMaxTextureSize;
63 }
64
getMaxViewportDims() const65 size_t GLES11RenderEngine::getMaxViewportDims() const {
66 return
67 mMaxViewportDims[0] < mMaxViewportDims[1] ?
68 mMaxViewportDims[0] : mMaxViewportDims[1];
69 }
70
setViewportAndProjection(size_t vpw,size_t vph,Rect sourceCrop,size_t hwh,bool yswap,Transform::orientation_flags rotation)71 void GLES11RenderEngine::setViewportAndProjection(
72 size_t vpw, size_t vph, Rect sourceCrop, size_t hwh, bool yswap,
73 Transform::orientation_flags rotation) {
74 glViewport(0, 0, vpw, vph);
75 glMatrixMode(GL_PROJECTION);
76 glLoadIdentity();
77
78 size_t l = sourceCrop.left;
79 size_t r = sourceCrop.right;
80
81 // In GL, (0, 0) is the bottom-left corner, so flip y coordinates
82 size_t t = hwh - sourceCrop.top;
83 size_t b = hwh - sourceCrop.bottom;
84
85 if (yswap) {
86 glOrthof(l, r, t, b, 0, 1);
87 } else {
88 glOrthof(l, r, b, t, 0, 1);
89 }
90
91 switch (rotation) {
92 case Transform::ROT_0:
93 break;
94 case Transform::ROT_90:
95 glRotatef(90, 0, 0, 1);
96 break;
97 case Transform::ROT_180:
98 glRotatef(180, 0, 0, 1);
99 break;
100 case Transform::ROT_270:
101 glRotatef(270, 0, 0, 1);
102 break;
103 default:
104 break;
105 }
106
107 glMatrixMode(GL_MODELVIEW);
108 }
109
110 #ifdef USE_HWC2
setupLayerBlending(bool premultipliedAlpha,bool opaque,float alpha)111 void GLES11RenderEngine::setupLayerBlending(bool premultipliedAlpha,
112 bool opaque, float alpha) {
113 #else
114 void GLES11RenderEngine::setupLayerBlending(
115 bool premultipliedAlpha, bool opaque, int alpha) {
116 #endif
117 GLenum combineRGB;
118 GLenum combineAlpha;
119 GLenum src0Alpha;
120 GLfloat envColor[4];
121
122 #ifdef USE_HWC2
123 if (CC_UNLIKELY(alpha < 1.0f)) {
124 #else
125 if (CC_UNLIKELY(alpha < 0xFF)) {
126 #endif
127 // Cv = premultiplied ? Cs*alpha : Cs
128 // Av = !opaque ? As*alpha : As
129 combineRGB = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
130 combineAlpha = !opaque ? GL_MODULATE : GL_REPLACE;
131 src0Alpha = GL_CONSTANT;
132 #ifdef USE_HWC2
133 envColor[0] = alpha;
134 #else
135 envColor[0] = alpha * (1.0f / 255.0f);
136 #endif
137 } else {
138 // Cv = Cs
139 // Av = opaque ? 1.0 : As
140 combineRGB = GL_REPLACE;
141 combineAlpha = GL_REPLACE;
142 src0Alpha = opaque ? GL_CONSTANT : GL_TEXTURE;
143 envColor[0] = 1.0f;
144 }
145
146 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
147 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
148 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
149 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
150 if (combineRGB == GL_MODULATE) {
151 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
152 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
153 }
154 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
155 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
156 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
157 if (combineAlpha == GL_MODULATE) {
158 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
159 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
160 }
161 if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
162 envColor[1] = envColor[0];
163 envColor[2] = envColor[0];
164 envColor[3] = envColor[0];
165 glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
166 }
167
168 #ifdef USE_HWC2
169 if (alpha < 1.0f || !opaque) {
170 #else
171 if (alpha < 0xFF || !opaque) {
172 #endif
173 glEnable(GL_BLEND);
174 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
175 GL_ONE_MINUS_SRC_ALPHA);
176 } else {
177 glDisable(GL_BLEND);
178 }
179 }
180
181 #ifdef USE_HWC2
182 void GLES11RenderEngine::setupDimLayerBlending(float alpha) {
183 #else
184 void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
185 #endif
186 glDisable(GL_TEXTURE_EXTERNAL_OES);
187 glDisable(GL_TEXTURE_2D);
188 #ifdef USE_HWC2
189 if (alpha == 1.0f) {
190 #else
191 if (alpha == 0xFF) {
192 #endif
193 glDisable(GL_BLEND);
194 } else {
195 glEnable(GL_BLEND);
196 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
197 }
198 #ifdef USE_HWC2
199 glColor4f(0, 0, 0, alpha);
200 #else
201 glColor4f(0, 0, 0, alpha/255.0f);
202 #endif
203 }
204
205 void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) {
206 GLuint target = texture.getTextureTarget();
207 glBindTexture(target, texture.getTextureName());
208 GLenum filter = GL_NEAREST;
209 if (texture.getFiltering()) {
210 filter = GL_LINEAR;
211 }
212 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
213 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
214 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter);
215 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter);
216 glMatrixMode(GL_TEXTURE);
217 glLoadMatrixf(texture.getMatrix().asArray());
218 glMatrixMode(GL_MODELVIEW);
219 glDisable(GL_TEXTURE_2D);
220 glEnable(GL_TEXTURE_EXTERNAL_OES);
221 }
222
223 void GLES11RenderEngine::setupLayerBlackedOut() {
224 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
225 glMatrixMode(GL_TEXTURE);
226 glLoadIdentity();
227 glMatrixMode(GL_MODELVIEW);
228 glDisable(GL_TEXTURE_EXTERNAL_OES);
229 glEnable(GL_TEXTURE_2D);
230 }
231
232 void GLES11RenderEngine::disableTexturing() {
233 glDisable(GL_TEXTURE_EXTERNAL_OES);
234 glDisable(GL_TEXTURE_2D);
235 }
236
237 void GLES11RenderEngine::disableBlending() {
238 glDisable(GL_BLEND);
239 }
240
241 void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
242 uint32_t* texName, uint32_t* fbName, uint32_t* status) {
243 GLuint tname, name;
244 // turn our EGLImage into a texture
245 glGenTextures(1, &tname);
246 glBindTexture(GL_TEXTURE_2D, tname);
247 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
248
249 // create a Framebuffer Object to render into
250 glGenFramebuffersOES(1, &name);
251 glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
252 glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
253 GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
254
255 *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
256 *texName = tname;
257 *fbName = name;
258 }
259
260 void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
261 glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
262 glDeleteFramebuffersOES(1, &fbName);
263 glDeleteTextures(1, &texName);
264 }
265
266 void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
267 glColor4f(r, g, b, a);
268 glDisable(GL_TEXTURE_EXTERNAL_OES);
269 glDisable(GL_TEXTURE_2D);
270 glDisable(GL_BLEND);
271 }
272
273 void GLES11RenderEngine::drawMesh(const Mesh& mesh) {
274 if (mesh.getTexCoordsSize()) {
275 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
276 glTexCoordPointer(mesh.getTexCoordsSize(),
277 GL_FLOAT,
278 mesh.getByteStride(),
279 mesh.getTexCoords());
280 }
281
282 glVertexPointer(mesh.getVertexSize(),
283 GL_FLOAT,
284 mesh.getByteStride(),
285 mesh.getPositions());
286
287 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
288
289 if (mesh.getTexCoordsSize()) {
290 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
291 }
292 }
293
294 void GLES11RenderEngine::dump(String8& result) {
295 RenderEngine::dump(result);
296 }
297
298 // ---------------------------------------------------------------------------
299 }; // namespace android
300 // ---------------------------------------------------------------------------
301
302 #if defined(__gl2_h_)
303 #error "don't include gl2/gl2.h in this file"
304 #endif
305