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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     (void)self;
     54 
     55     DBG("glEGLImageTargetTexture2DOES v1 target=%#x image=%p", target, image);
     56     //TODO: check error - we don't have a way to set gl error
     57     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     58 
     59     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     60         return;
     61     }
     62 
     63     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     64         return;
     65     }
     66 
     67     GET_CONTEXT;
     68     DEFINE_AND_VALIDATE_HOST_CONNECTION();
     69 
     70     ctx->override2DTextureTarget(target);
     71     rcEnc->rcBindTexture(rcEnc,
     72             ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     73     ctx->restore2DTextureTarget();
     74 
     75     return;
     76 }
     77 
     78 void glEGLImageTargetRenderbufferStorageOES(void *self, GLenum target, GLeglImageOES image)
     79 {
     80     (void)self;
     81     (void)target;
     82 
     83     DBG("glEGLImageTargetRenderbufferStorageOES v1 target=%#x image=%p",
     84             target, image);
     85     //TODO: check error - we don't have a way to set gl error
     86     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     87 
     88     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     89         return;
     90     }
     91 
     92     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     93         return;
     94     }
     95 
     96     DEFINE_AND_VALIDATE_HOST_CONNECTION();
     97     rcEnc->rcBindRenderbuffer(rcEnc,
     98             ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     99 
    100     return;
    101 }
    102 
    103 void * getProcAddress(const char * procname)
    104 {
    105     // search in GL function table
    106     for (int i=0; i<gl_num_funcs; i++) {
    107         if (!strcmp(gl_funcs_by_name[i].name, procname)) {
    108             return gl_funcs_by_name[i].proc;
    109         }
    110     }
    111     return NULL;
    112 }
    113 
    114 void finish()
    115 {
    116     glFinish();
    117 }
    118 
    119 const GLubyte *my_glGetString (void *self, GLenum name)
    120 {
    121     (void)self;
    122 
    123     if (s_egl) {
    124         return (const GLubyte*)s_egl->getGLString(name);
    125     }
    126     return NULL;
    127 }
    128 
    129 void init()
    130 {
    131     GET_CONTEXT;
    132     ctx->glEGLImageTargetTexture2DOES = &glEGLImageTargetTexture2DOES;
    133     ctx->glEGLImageTargetRenderbufferStorageOES = &glEGLImageTargetRenderbufferStorageOES;
    134     ctx->glGetString = &my_glGetString;
    135 }
    136 
    137 extern "C" {
    138 EGLClient_glesInterface * init_emul_gles(EGLClient_eglInterface *eglIface)
    139 {
    140     s_egl = eglIface;
    141 
    142     if (!s_gl) {
    143         s_gl = new EGLClient_glesInterface();
    144         s_gl->getProcAddress = getProcAddress;
    145         s_gl->finish = finish;
    146         s_gl->init = init;
    147     }
    148 
    149     return s_gl;
    150 }
    151 } //extern
    152 
    153 
    154