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 <utils/String8.h>
21 #include <cutils/compiler.h>
22
23 #include "GLES11RenderEngine.h"
24 #include "Mesh.h"
25 #include "Texture.h"
26
27 // ---------------------------------------------------------------------------
28 namespace android {
29 // ---------------------------------------------------------------------------
30
GLES11RenderEngine()31 GLES11RenderEngine::GLES11RenderEngine() {
32
33 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
34 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
35
36 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
37 glPixelStorei(GL_PACK_ALIGNMENT, 4);
38 glEnableClientState(GL_VERTEX_ARRAY);
39 glShadeModel(GL_FLAT);
40 glDisable(GL_DITHER);
41 glDisable(GL_CULL_FACE);
42
43 struct pack565 {
44 inline uint16_t operator() (int r, int g, int b) const {
45 return (r<<11)|(g<<5)|b;
46 }
47 } pack565;
48
49 const uint16_t protTexData[] = { 0 };
50 glGenTextures(1, &mProtectedTexName);
51 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
52 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
53 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
54 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
55 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
56 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
57 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
58 }
59
~GLES11RenderEngine()60 GLES11RenderEngine::~GLES11RenderEngine() {
61 }
62
63
getMaxTextureSize() const64 size_t GLES11RenderEngine::getMaxTextureSize() const {
65 return mMaxTextureSize;
66 }
67
getMaxViewportDims() const68 size_t GLES11RenderEngine::getMaxViewportDims() const {
69 return
70 mMaxViewportDims[0] < mMaxViewportDims[1] ?
71 mMaxViewportDims[0] : mMaxViewportDims[1];
72 }
73
setViewportAndProjection(size_t vpw,size_t vph,size_t w,size_t h,bool yswap)74 void GLES11RenderEngine::setViewportAndProjection(
75 size_t vpw, size_t vph, size_t w, size_t h, bool yswap) {
76 glViewport(0, 0, vpw, vph);
77 glMatrixMode(GL_PROJECTION);
78 glLoadIdentity();
79 // put the origin in the left-bottom corner
80 if (yswap) glOrthof(0, w, h, 0, 0, 1);
81 else glOrthof(0, w, 0, h, 0, 1);
82 glMatrixMode(GL_MODELVIEW);
83 }
84
setupLayerBlending(bool premultipliedAlpha,bool opaque,int alpha)85 void GLES11RenderEngine::setupLayerBlending(
86 bool premultipliedAlpha, bool opaque, int alpha) {
87 GLenum combineRGB;
88 GLenum combineAlpha;
89 GLenum src0Alpha;
90 GLfloat envColor[4];
91
92 if (CC_UNLIKELY(alpha < 0xFF)) {
93 // Cv = premultiplied ? Cs*alpha : Cs
94 // Av = !opaque ? As*alpha : As
95 combineRGB = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
96 combineAlpha = !opaque ? GL_MODULATE : GL_REPLACE;
97 src0Alpha = GL_CONSTANT;
98 envColor[0] = alpha * (1.0f / 255.0f);
99 } else {
100 // Cv = Cs
101 // Av = opaque ? 1.0 : As
102 combineRGB = GL_REPLACE;
103 combineAlpha = GL_REPLACE;
104 src0Alpha = opaque ? GL_CONSTANT : GL_TEXTURE;
105 envColor[0] = 1.0f;
106 }
107
108 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
109 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
110 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
111 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
112 if (combineRGB == GL_MODULATE) {
113 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
114 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
115 }
116 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
117 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
118 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
119 if (combineAlpha == GL_MODULATE) {
120 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
121 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
122 }
123 if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
124 envColor[1] = envColor[0];
125 envColor[2] = envColor[0];
126 envColor[3] = envColor[0];
127 glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
128 }
129
130 if (alpha < 0xFF || !opaque) {
131 glEnable(GL_BLEND);
132 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
133 GL_ONE_MINUS_SRC_ALPHA);
134 } else {
135 glDisable(GL_BLEND);
136 }
137 }
138
setupDimLayerBlending(int alpha)139 void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
140 glDisable(GL_TEXTURE_EXTERNAL_OES);
141 glDisable(GL_TEXTURE_2D);
142 if (alpha == 0xFF) {
143 glDisable(GL_BLEND);
144 } else {
145 glEnable(GL_BLEND);
146 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
147 }
148 glColor4f(0, 0, 0, alpha/255.0f);
149 }
150
setupLayerTexturing(const Texture & texture)151 void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) {
152 GLuint target = texture.getTextureTarget();
153 glBindTexture(target, texture.getTextureName());
154 GLenum filter = GL_NEAREST;
155 if (texture.getFiltering()) {
156 filter = GL_LINEAR;
157 }
158 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
159 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
160 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter);
161 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter);
162 glMatrixMode(GL_TEXTURE);
163 glLoadMatrixf(texture.getMatrix().asArray());
164 glMatrixMode(GL_MODELVIEW);
165 glDisable(GL_TEXTURE_2D);
166 glEnable(GL_TEXTURE_EXTERNAL_OES);
167 }
168
setupLayerBlackedOut()169 void GLES11RenderEngine::setupLayerBlackedOut() {
170 glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
171 glMatrixMode(GL_TEXTURE);
172 glLoadIdentity();
173 glMatrixMode(GL_MODELVIEW);
174 glDisable(GL_TEXTURE_EXTERNAL_OES);
175 glEnable(GL_TEXTURE_2D);
176 }
177
disableTexturing()178 void GLES11RenderEngine::disableTexturing() {
179 glDisable(GL_TEXTURE_EXTERNAL_OES);
180 glDisable(GL_TEXTURE_2D);
181 }
182
disableBlending()183 void GLES11RenderEngine::disableBlending() {
184 glDisable(GL_BLEND);
185 }
186
bindImageAsFramebuffer(EGLImageKHR image,uint32_t * texName,uint32_t * fbName,uint32_t * status)187 void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
188 uint32_t* texName, uint32_t* fbName, uint32_t* status) {
189 GLuint tname, name;
190 // turn our EGLImage into a texture
191 glGenTextures(1, &tname);
192 glBindTexture(GL_TEXTURE_2D, tname);
193 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
194
195 // create a Framebuffer Object to render into
196 glGenFramebuffersOES(1, &name);
197 glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
198 glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
199 GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
200
201 *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
202 *texName = tname;
203 *fbName = name;
204 }
205
unbindFramebuffer(uint32_t texName,uint32_t fbName)206 void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
207 glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
208 glDeleteFramebuffersOES(1, &fbName);
209 glDeleteTextures(1, &texName);
210 }
211
setupFillWithColor(float r,float g,float b,float a)212 void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
213 glColor4f(r, g, b, a);
214 glDisable(GL_TEXTURE_EXTERNAL_OES);
215 glDisable(GL_TEXTURE_2D);
216 glDisable(GL_BLEND);
217 }
218
drawMesh(const Mesh & mesh)219 void GLES11RenderEngine::drawMesh(const Mesh& mesh) {
220 if (mesh.getTexCoordsSize()) {
221 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
222 glTexCoordPointer(mesh.getTexCoordsSize(),
223 GL_FLOAT,
224 mesh.getByteStride(),
225 mesh.getTexCoords());
226 }
227
228 glVertexPointer(mesh.getVertexSize(),
229 GL_FLOAT,
230 mesh.getByteStride(),
231 mesh.getPositions());
232
233 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
234
235 if (mesh.getTexCoordsSize()) {
236 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
237 }
238 }
239
beginGroup(const mat4 & colorTransform)240 void GLES11RenderEngine::beginGroup(const mat4& colorTransform) {
241 // doesn't do anything in GLES 1.1
242 }
243
endGroup()244 void GLES11RenderEngine::endGroup() {
245 // doesn't do anything in GLES 1.1
246 }
247
dump(String8 & result)248 void GLES11RenderEngine::dump(String8& result) {
249 RenderEngine::dump(result);
250 }
251
252 // ---------------------------------------------------------------------------
253 }; // namespace android
254 // ---------------------------------------------------------------------------
255
256 #if defined(__gl2_h_)
257 #error "don't include gl2/gl2.h in this file"
258 #endif
259