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      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 "EGLClientIface.h"
     18 #include "HostConnection.h"
     19 #include "GL2Encoder.h"
     20 #include "GLES/gl.h"
     21 #include "GLES/glext.h"
     22 #include "ErrorLog.h"
     23 #include "gralloc_cb.h"
     24 #include "ThreadInfo.h"
     25 
     26 //XXX: fix this macro to get the context from fast tls path
     27 #define GET_CONTEXT GL2Encoder * ctx = getEGLThreadInfo()->hostConn->gl2Encoder();
     28 
     29 #include "gl2_entry.cpp"
     30 
     31 //The functions table
     32 #include "gl2_ftable.h"
     33 
     34 
     35 static EGLClient_eglInterface * s_egl = NULL;
     36 static EGLClient_glesInterface * s_gl = NULL;
     37 
     38 #define DEFINE_AND_VALIDATE_HOST_CONNECTION(ret) \
     39     HostConnection *hostCon = HostConnection::get(); \
     40     if (!hostCon) { \
     41         ALOGE("egl: Failed to get host connection\n"); \
     42         return ret; \
     43     } \
     44     renderControl_encoder_context_t *rcEnc = hostCon->rcEncoder(); \
     45     if (!rcEnc) { \
     46         ALOGE("egl: Failed to get renderControl encoder context\n"); \
     47         return ret; \
     48     }
     49 
     50 //GL extensions
     51 void glEGLImageTargetTexture2DOES(void * self, GLenum target, GLeglImageOES image)
     52 {
     53     DBG("glEGLImageTargetTexture2DOES v2 target=%#x img=%p\n", target, image);
     54     //TODO: check error - we don't have a way to set gl error
     55     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     56 
     57     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     58         return;
     59     }
     60 
     61     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     62         return;
     63     }
     64 
     65     GET_CONTEXT;
     66     DEFINE_AND_VALIDATE_HOST_CONNECTION();
     67 
     68     ctx->override2DTextureTarget(target);
     69     rcEnc->rcBindTexture(rcEnc, ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     70     ctx->restore2DTextureTarget();
     71 
     72     return;
     73 }
     74 
     75 void glEGLImageTargetRenderbufferStorageOES(void *self, GLenum target, GLeglImageOES image)
     76 {
     77     DBG("glEGLImageTargetRenderbufferStorageOES v2 image=%p\n", image);
     78     //TODO: check error - we don't have a way to set gl error
     79     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     80 
     81     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     82         return;
     83     }
     84 
     85     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     86         return;
     87     }
     88 
     89     DEFINE_AND_VALIDATE_HOST_CONNECTION();
     90     rcEnc->rcBindRenderbuffer(rcEnc, ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     91 
     92     return;
     93 }
     94 
     95 void * getProcAddress(const char * procname)
     96 {
     97     // search in GL function table
     98     for (int i=0; i<gl2_num_funcs; i++) {
     99         if (!strcmp(gl2_funcs_by_name[i].name, procname)) {
    100             return gl2_funcs_by_name[i].proc;
    101         }
    102     }
    103     return NULL;
    104 }
    105 
    106 void finish()
    107 {
    108     glFinish();
    109 }
    110 
    111 const GLubyte *my_glGetString (void *self, GLenum name)
    112 {
    113     if (s_egl) {
    114         return (const GLubyte*)s_egl->getGLString(name);
    115     }
    116     return NULL;
    117 }
    118 
    119 void init()
    120 {
    121     GET_CONTEXT;
    122     ctx->set_glEGLImageTargetTexture2DOES(glEGLImageTargetTexture2DOES);
    123     ctx->set_glEGLImageTargetRenderbufferStorageOES(glEGLImageTargetRenderbufferStorageOES);
    124     ctx->set_glGetString(my_glGetString);
    125 }
    126 
    127 extern "C" {
    128 EGLClient_glesInterface * init_emul_gles(EGLClient_eglInterface *eglIface)
    129 {
    130     s_egl = eglIface;
    131 
    132     if (!s_gl) {
    133         s_gl = new EGLClient_glesInterface();
    134         s_gl->getProcAddress = getProcAddress;
    135         s_gl->finish = finish;
    136         s_gl->init = init;
    137     }
    138 
    139     return s_gl;
    140 }
    141 } //extern
    142 
    143 
    144