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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 "GLEncoder.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 
     27 //XXX: fix this macro to get the context from fast tls path
     28 #define GET_CONTEXT GLEncoder * ctx = getEGLThreadInfo()->hostConn->glEncoder();
     29 
     30 #include "gl_entry.cpp"
     31 
     32 //The functions table
     33 #include "gl_ftable.h"
     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 v1 target=%#x image=%p", 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,
     70             ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     71     ctx->restore2DTextureTarget();
     72 
     73     return;
     74 }
     75 
     76 void glEGLImageTargetRenderbufferStorageOES(void *self, GLenum target, GLeglImageOES image)
     77 {
     78     DBG("glEGLImageTargetRenderbufferStorageOES v1 target=%#x image=%p",
     79             target, image);
     80     //TODO: check error - we don't have a way to set gl error
     81     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     82 
     83     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     84         return;
     85     }
     86 
     87     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     88         return;
     89     }
     90 
     91     DEFINE_AND_VALIDATE_HOST_CONNECTION();
     92     rcEnc->rcBindRenderbuffer(rcEnc,
     93             ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     94 
     95     return;
     96 }
     97 
     98 void * getProcAddress(const char * procname)
     99 {
    100     // search in GL function table
    101     for (int i=0; i<gl_num_funcs; i++) {
    102         if (!strcmp(gl_funcs_by_name[i].name, procname)) {
    103             return gl_funcs_by_name[i].proc;
    104         }
    105     }
    106     return NULL;
    107 }
    108 
    109 void finish()
    110 {
    111     glFinish();
    112 }
    113 
    114 const GLubyte *my_glGetString (void *self, GLenum name)
    115 {
    116     if (s_egl) {
    117         return (const GLubyte*)s_egl->getGLString(name);
    118     }
    119     return NULL;
    120 }
    121 
    122 void init()
    123 {
    124     GET_CONTEXT;
    125     ctx->set_glEGLImageTargetTexture2DOES(glEGLImageTargetTexture2DOES);
    126     ctx->set_glEGLImageTargetRenderbufferStorageOES(glEGLImageTargetRenderbufferStorageOES);
    127     ctx->set_glGetString(my_glGetString);
    128 }
    129 
    130 extern "C" {
    131 EGLClient_glesInterface * init_emul_gles(EGLClient_eglInterface *eglIface)
    132 {
    133     s_egl = eglIface;
    134 
    135     if (!s_gl) {
    136         s_gl = new EGLClient_glesInterface();
    137         s_gl->getProcAddress = getProcAddress;
    138         s_gl->finish = finish;
    139         s_gl->init = init;
    140     }
    141 
    142     return s_gl;
    143 }
    144 } //extern
    145 
    146 
    147