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
setupLayerBlending(bool premultipliedAlpha,bool opaque,int alpha)110 void GLES11RenderEngine::setupLayerBlending(
111 bool premultipliedAlpha, bool opaque, int alpha) {
112 GLenum combineRGB;
113 GLenum combineAlpha;
114 GLenum src0Alpha;
115 GLfloat envColor[4];
116
117 if (CC_UNLIKELY(alpha < 0xFF)) {
118 // Cv = premultiplied ? Cs*alpha : Cs
119 // Av = !opaque ? As*alpha : As
120 combineRGB = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
121 combineAlpha = !opaque ? GL_MODULATE : GL_REPLACE;
122 src0Alpha = GL_CONSTANT;
123 envColor[0] = alpha * (1.0f / 255.0f);
124 } else {
125 // Cv = Cs
126 // Av = opaque ? 1.0 : As
127 combineRGB = GL_REPLACE;
128 combineAlpha = GL_REPLACE;
129 src0Alpha = opaque ? GL_CONSTANT : GL_TEXTURE;
130 envColor[0] = 1.0f;
131 }
132
133 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
134 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
135 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
136 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
137 if (combineRGB == GL_MODULATE) {
138 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
139 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
140 }
141 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
142 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
143 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
144 if (combineAlpha == GL_MODULATE) {
145 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
146 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
147 }
148 if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
149 envColor[1] = envColor[0];
150 envColor[2] = envColor[0];
151 envColor[3] = envColor[0];
152 glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
153 }
154
155 if (alpha < 0xFF || !opaque) {
156 glEnable(GL_BLEND);
157 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
158 GL_ONE_MINUS_SRC_ALPHA);
159 } else {
160 glDisable(GL_BLEND);
161 }
162 }
163
setupDimLayerBlending(int alpha)164 void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
165 glDisable(GL_TEXTURE_EXTERNAL_OES);
166 glDisable(GL_TEXTURE_2D);
167 if (alpha == 0xFF) {
168 glDisable(GL_BLEND);
169 } else {
170 glEnable(GL_BLEND);
171 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
172 }
173 glColor4f(0, 0, 0, alpha/255.0f);
174 }
175
setupLayerTexturing(const Texture & texture)176 void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) {
177 GLuint target = texture.getTextureTarget();
178 glBindTexture(target, texture.getTextureName());
179 GLenum filter = GL_NEAREST;
180 if (texture.getFiltering()) {
181 filter = GL_LINEAR;
182 }
183 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
184 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
185 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter);
186 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter);
187 glMatrixMode(GL_TEXTURE);
188 glLoadMatrixf(texture.getMatrix().asArray());
189 glMatrixMode(GL_MODELVIEW);
190 glDisable(GL_TEXTURE_2D);
191 glEnable(GL_TEXTURE_EXTERNAL_OES);
192 }
193
setupLayerBlackedOut()194 void GLES11RenderEngine::setupLayerBlackedOut() {
195 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
196 glMatrixMode(GL_TEXTURE);
197 glLoadIdentity();
198 glMatrixMode(GL_MODELVIEW);
199 glDisable(GL_TEXTURE_EXTERNAL_OES);
200 glEnable(GL_TEXTURE_2D);
201 }
202
disableTexturing()203 void GLES11RenderEngine::disableTexturing() {
204 glDisable(GL_TEXTURE_EXTERNAL_OES);
205 glDisable(GL_TEXTURE_2D);
206 }
207
disableBlending()208 void GLES11RenderEngine::disableBlending() {
209 glDisable(GL_BLEND);
210 }
211
bindImageAsFramebuffer(EGLImageKHR image,uint32_t * texName,uint32_t * fbName,uint32_t * status)212 void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
213 uint32_t* texName, uint32_t* fbName, uint32_t* status) {
214 GLuint tname, name;
215 // turn our EGLImage into a texture
216 glGenTextures(1, &tname);
217 glBindTexture(GL_TEXTURE_2D, tname);
218 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
219
220 // create a Framebuffer Object to render into
221 glGenFramebuffersOES(1, &name);
222 glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
223 glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
224 GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
225
226 *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
227 *texName = tname;
228 *fbName = name;
229 }
230
unbindFramebuffer(uint32_t texName,uint32_t fbName)231 void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
232 glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
233 glDeleteFramebuffersOES(1, &fbName);
234 glDeleteTextures(1, &texName);
235 }
236
setupFillWithColor(float r,float g,float b,float a)237 void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
238 glColor4f(r, g, b, a);
239 glDisable(GL_TEXTURE_EXTERNAL_OES);
240 glDisable(GL_TEXTURE_2D);
241 glDisable(GL_BLEND);
242 }
243
drawMesh(const Mesh & mesh)244 void GLES11RenderEngine::drawMesh(const Mesh& mesh) {
245 if (mesh.getTexCoordsSize()) {
246 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
247 glTexCoordPointer(mesh.getTexCoordsSize(),
248 GL_FLOAT,
249 mesh.getByteStride(),
250 mesh.getTexCoords());
251 }
252
253 glVertexPointer(mesh.getVertexSize(),
254 GL_FLOAT,
255 mesh.getByteStride(),
256 mesh.getPositions());
257
258 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
259
260 if (mesh.getTexCoordsSize()) {
261 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
262 }
263 }
264
dump(String8 & result)265 void GLES11RenderEngine::dump(String8& result) {
266 RenderEngine::dump(result);
267 }
268
269 // ---------------------------------------------------------------------------
270 }; // namespace android
271 // ---------------------------------------------------------------------------
272
273 #if defined(__gl2_h_)
274 #error "don't include gl2/gl2.h in this file"
275 #endif
276