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 struct pack565 {
47 inline uint16_t operator() (int r, int g, int b) const {
48 return (r<<11)|(g<<5)|b;
49 }
50 } pack565;
51
52 const uint16_t protTexData[] = { 0 };
53 glGenTextures(1, &mProtectedTexName);
54 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
55 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
56 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
57 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
58 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
59 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
60 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
61 }
62
~GLES11RenderEngine()63 GLES11RenderEngine::~GLES11RenderEngine() {
64 }
65
66
getMaxTextureSize() const67 size_t GLES11RenderEngine::getMaxTextureSize() const {
68 return mMaxTextureSize;
69 }
70
getMaxViewportDims() const71 size_t GLES11RenderEngine::getMaxViewportDims() const {
72 return
73 mMaxViewportDims[0] < mMaxViewportDims[1] ?
74 mMaxViewportDims[0] : mMaxViewportDims[1];
75 }
76
setViewportAndProjection(size_t vpw,size_t vph,Rect sourceCrop,size_t hwh,bool yswap,Transform::orientation_flags rotation)77 void GLES11RenderEngine::setViewportAndProjection(
78 size_t vpw, size_t vph, Rect sourceCrop, size_t hwh, bool yswap,
79 Transform::orientation_flags rotation) {
80 glViewport(0, 0, vpw, vph);
81 glMatrixMode(GL_PROJECTION);
82 glLoadIdentity();
83
84 size_t l = sourceCrop.left;
85 size_t r = sourceCrop.right;
86
87 // In GL, (0, 0) is the bottom-left corner, so flip y coordinates
88 size_t t = hwh - sourceCrop.top;
89 size_t b = hwh - sourceCrop.bottom;
90
91 if (yswap) {
92 glOrthof(l, r, t, b, 0, 1);
93 } else {
94 glOrthof(l, r, b, t, 0, 1);
95 }
96
97 switch (rotation) {
98 case Transform::ROT_0:
99 break;
100 case Transform::ROT_90:
101 glRotatef(90, 0, 0, 1);
102 break;
103 case Transform::ROT_180:
104 glRotatef(180, 0, 0, 1);
105 break;
106 case Transform::ROT_270:
107 glRotatef(270, 0, 0, 1);
108 break;
109 default:
110 break;
111 }
112
113 glMatrixMode(GL_MODELVIEW);
114 }
115
setupLayerBlending(bool premultipliedAlpha,bool opaque,int alpha)116 void GLES11RenderEngine::setupLayerBlending(
117 bool premultipliedAlpha, bool opaque, int alpha) {
118 GLenum combineRGB;
119 GLenum combineAlpha;
120 GLenum src0Alpha;
121 GLfloat envColor[4];
122
123 if (CC_UNLIKELY(alpha < 0xFF)) {
124 // Cv = premultiplied ? Cs*alpha : Cs
125 // Av = !opaque ? As*alpha : As
126 combineRGB = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
127 combineAlpha = !opaque ? GL_MODULATE : GL_REPLACE;
128 src0Alpha = GL_CONSTANT;
129 envColor[0] = alpha * (1.0f / 255.0f);
130 } else {
131 // Cv = Cs
132 // Av = opaque ? 1.0 : As
133 combineRGB = GL_REPLACE;
134 combineAlpha = GL_REPLACE;
135 src0Alpha = opaque ? GL_CONSTANT : GL_TEXTURE;
136 envColor[0] = 1.0f;
137 }
138
139 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
140 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
141 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
142 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
143 if (combineRGB == GL_MODULATE) {
144 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
145 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
146 }
147 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
148 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
149 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
150 if (combineAlpha == GL_MODULATE) {
151 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
152 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
153 }
154 if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
155 envColor[1] = envColor[0];
156 envColor[2] = envColor[0];
157 envColor[3] = envColor[0];
158 glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
159 }
160
161 if (alpha < 0xFF || !opaque) {
162 glEnable(GL_BLEND);
163 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
164 GL_ONE_MINUS_SRC_ALPHA);
165 } else {
166 glDisable(GL_BLEND);
167 }
168 }
169
setupDimLayerBlending(int alpha)170 void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
171 glDisable(GL_TEXTURE_EXTERNAL_OES);
172 glDisable(GL_TEXTURE_2D);
173 if (alpha == 0xFF) {
174 glDisable(GL_BLEND);
175 } else {
176 glEnable(GL_BLEND);
177 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
178 }
179 glColor4f(0, 0, 0, alpha/255.0f);
180 }
181
setupLayerTexturing(const Texture & texture)182 void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) {
183 GLuint target = texture.getTextureTarget();
184 glBindTexture(target, texture.getTextureName());
185 GLenum filter = GL_NEAREST;
186 if (texture.getFiltering()) {
187 filter = GL_LINEAR;
188 }
189 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
190 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
191 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter);
192 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter);
193 glMatrixMode(GL_TEXTURE);
194 glLoadMatrixf(texture.getMatrix().asArray());
195 glMatrixMode(GL_MODELVIEW);
196 glDisable(GL_TEXTURE_2D);
197 glEnable(GL_TEXTURE_EXTERNAL_OES);
198 }
199
setupLayerBlackedOut()200 void GLES11RenderEngine::setupLayerBlackedOut() {
201 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
202 glMatrixMode(GL_TEXTURE);
203 glLoadIdentity();
204 glMatrixMode(GL_MODELVIEW);
205 glDisable(GL_TEXTURE_EXTERNAL_OES);
206 glEnable(GL_TEXTURE_2D);
207 }
208
disableTexturing()209 void GLES11RenderEngine::disableTexturing() {
210 glDisable(GL_TEXTURE_EXTERNAL_OES);
211 glDisable(GL_TEXTURE_2D);
212 }
213
disableBlending()214 void GLES11RenderEngine::disableBlending() {
215 glDisable(GL_BLEND);
216 }
217
bindImageAsFramebuffer(EGLImageKHR image,uint32_t * texName,uint32_t * fbName,uint32_t * status)218 void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
219 uint32_t* texName, uint32_t* fbName, uint32_t* status) {
220 GLuint tname, name;
221 // turn our EGLImage into a texture
222 glGenTextures(1, &tname);
223 glBindTexture(GL_TEXTURE_2D, tname);
224 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
225
226 // create a Framebuffer Object to render into
227 glGenFramebuffersOES(1, &name);
228 glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
229 glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
230 GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
231
232 *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
233 *texName = tname;
234 *fbName = name;
235 }
236
unbindFramebuffer(uint32_t texName,uint32_t fbName)237 void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
238 glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
239 glDeleteFramebuffersOES(1, &fbName);
240 glDeleteTextures(1, &texName);
241 }
242
setupFillWithColor(float r,float g,float b,float a)243 void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
244 glColor4f(r, g, b, a);
245 glDisable(GL_TEXTURE_EXTERNAL_OES);
246 glDisable(GL_TEXTURE_2D);
247 glDisable(GL_BLEND);
248 }
249
drawMesh(const Mesh & mesh)250 void GLES11RenderEngine::drawMesh(const Mesh& mesh) {
251 if (mesh.getTexCoordsSize()) {
252 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
253 glTexCoordPointer(mesh.getTexCoordsSize(),
254 GL_FLOAT,
255 mesh.getByteStride(),
256 mesh.getTexCoords());
257 }
258
259 glVertexPointer(mesh.getVertexSize(),
260 GL_FLOAT,
261 mesh.getByteStride(),
262 mesh.getPositions());
263
264 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
265
266 if (mesh.getTexCoordsSize()) {
267 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
268 }
269 }
270
beginGroup(const mat4 &)271 void GLES11RenderEngine::beginGroup(const mat4& /*colorTransform*/) {
272 // doesn't do anything in GLES 1.1
273 }
274
endGroup()275 void GLES11RenderEngine::endGroup() {
276 // doesn't do anything in GLES 1.1
277 }
278
dump(String8 & result)279 void GLES11RenderEngine::dump(String8& result) {
280 RenderEngine::dump(result);
281 }
282
283 // ---------------------------------------------------------------------------
284 }; // namespace android
285 // ---------------------------------------------------------------------------
286
287 #if defined(__gl2_h_)
288 #error "don't include gl2/gl2.h in this file"
289 #endif
290