1 /*
2 * Copyright 2011 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 "GL2Decoder.h"
18 #include <EGL/egl.h>
19 #include <GLES2/gl2.h>
20 #include <GLES2/gl2ext.h>
21
SafePointerFromUInt(GLuint value)22 static inline void* SafePointerFromUInt(GLuint value) {
23 return (void*)(uintptr_t)value;
24 }
25
GL2Decoder()26 GL2Decoder::GL2Decoder()
27 {
28 m_contextData = NULL;
29 m_GL2library = NULL;
30 }
31
~GL2Decoder()32 GL2Decoder::~GL2Decoder()
33 {
34 delete m_GL2library;
35 }
36
s_getProc(const char * name,void * userData)37 void *GL2Decoder::s_getProc(const char *name, void *userData)
38 {
39 GL2Decoder *ctx = (GL2Decoder *) userData;
40
41 if (ctx == NULL || ctx->m_GL2library == NULL) {
42 return NULL;
43 }
44
45 void *func = NULL;
46 #ifdef USE_EGL_GETPROCADDRESS
47 func = (void *) eglGetProcAddress(name);
48 #endif
49 if (func == NULL) {
50 func = (void *) ctx->m_GL2library->findSymbol(name);
51 }
52 return func;
53 }
54
initGL(get_proc_func_t getProcFunc,void * getProcFuncData)55 int GL2Decoder::initGL(get_proc_func_t getProcFunc, void *getProcFuncData)
56 {
57 if (getProcFunc == NULL) {
58 const char *libname = GLES2_LIBNAME;
59 if (getenv(GLES2_LIBNAME_VAR) != NULL) {
60 libname = getenv(GLES2_LIBNAME_VAR);
61 }
62
63 m_GL2library = osUtils::dynLibrary::open(libname);
64 if (m_GL2library == NULL) {
65 fprintf(stderr, "%s: Couldn't find %s \n", __FUNCTION__, libname);
66 return -1;
67 }
68 this->initDispatchByName(s_getProc, this);
69 } else {
70 this->initDispatchByName(getProcFunc, getProcFuncData);
71 }
72
73 set_glGetCompressedTextureFormats(s_glGetCompressedTextureFormats);
74 set_glVertexAttribPointerData(s_glVertexAttribPointerData);
75 set_glVertexAttribPointerOffset(s_glVertexAttribPointerOffset);
76
77 set_glDrawElementsOffset(s_glDrawElementsOffset);
78 set_glDrawElementsData(s_glDrawElementsData);
79 set_glShaderString(s_glShaderString);
80 set_glFinishRoundTrip(s_glFinishRoundTrip);
81 return 0;
82
83 }
84
s_glFinishRoundTrip(void * self)85 int GL2Decoder::s_glFinishRoundTrip(void *self)
86 {
87 GL2Decoder *ctx = (GL2Decoder *)self;
88 ctx->glFinish();
89 return 0;
90 }
91
s_glGetCompressedTextureFormats(void * self,int count,GLint * formats)92 void GL2Decoder::s_glGetCompressedTextureFormats(void *self, int count, GLint *formats)
93 {
94 GL2Decoder *ctx = (GL2Decoder *) self;
95
96 int nFormats;
97 ctx->glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &nFormats);
98 if (nFormats > count) {
99 fprintf(stderr, "%s: GetCompressedTextureFormats: The requested number of formats does not match the number that is reported by OpenGL\n", __FUNCTION__);
100 } else {
101 ctx->glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, formats);
102 }
103 }
104
s_glVertexAttribPointerData(void * self,GLuint indx,GLint size,GLenum type,GLboolean normalized,GLsizei stride,void * data,GLuint datalen)105 void GL2Decoder::s_glVertexAttribPointerData(void *self, GLuint indx, GLint size, GLenum type,
106 GLboolean normalized, GLsizei stride, void * data, GLuint datalen)
107 {
108 GL2Decoder *ctx = (GL2Decoder *) self;
109 if (ctx->m_contextData != NULL) {
110 ctx->m_contextData->storePointerData(indx, data, datalen);
111 // note - the stride of the data is always zero when it comes out of the codec.
112 // See gl2.attrib for the packing function call.
113 ctx->glVertexAttribPointer(indx, size, type, normalized, 0, ctx->m_contextData->pointerData(indx));
114 }
115 }
116
s_glVertexAttribPointerOffset(void * self,GLuint indx,GLint size,GLenum type,GLboolean normalized,GLsizei stride,GLuint data)117 void GL2Decoder::s_glVertexAttribPointerOffset(void *self, GLuint indx, GLint size, GLenum type,
118 GLboolean normalized, GLsizei stride, GLuint data)
119 {
120 GL2Decoder *ctx = (GL2Decoder *) self;
121 ctx->glVertexAttribPointer(indx, size, type, normalized, stride, SafePointerFromUInt(data));
122 }
123
124
s_glDrawElementsData(void * self,GLenum mode,GLsizei count,GLenum type,void * data,GLuint datalen)125 void GL2Decoder::s_glDrawElementsData(void *self, GLenum mode, GLsizei count, GLenum type, void * data, GLuint datalen)
126 {
127 GL2Decoder *ctx = (GL2Decoder *)self;
128 ctx->glDrawElements(mode, count, type, data);
129 }
130
131
s_glDrawElementsOffset(void * self,GLenum mode,GLsizei count,GLenum type,GLuint offset)132 void GL2Decoder::s_glDrawElementsOffset(void *self, GLenum mode, GLsizei count, GLenum type, GLuint offset)
133 {
134 GL2Decoder *ctx = (GL2Decoder *)self;
135 ctx->glDrawElements(mode, count, type, SafePointerFromUInt(offset));
136 }
137
s_glShaderString(void * self,GLuint shader,const GLchar * string,GLsizei len)138 void GL2Decoder::s_glShaderString(void *self, GLuint shader, const GLchar* string, GLsizei len)
139 {
140 GL2Decoder *ctx = (GL2Decoder *)self;
141 ctx->glShaderSource(shader, 1, &string, NULL);
142 }
143