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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 #include "EGLImage.h"
     26 
     27 
     28 //XXX: fix this macro to get the context from fast tls path
     29 #define GET_CONTEXT GLEncoder * ctx = getEGLThreadInfo()->hostConn->glEncoder();
     30 
     31 #include "gl_entry.cpp"
     32 
     33 //The functions table
     34 #include "gl_ftable.h"
     35 
     36 static EGLClient_eglInterface * s_egl = NULL;
     37 static EGLClient_glesInterface * s_gl = NULL;
     38 
     39 #define DEFINE_AND_VALIDATE_HOST_CONNECTION(ret) \
     40     HostConnection *hostCon = HostConnection::get(); \
     41     if (!hostCon) { \
     42         ALOGE("egl: Failed to get host connection\n"); \
     43         return ret; \
     44     } \
     45     renderControl_encoder_context_t *rcEnc = hostCon->rcEncoder(); \
     46     if (!rcEnc) { \
     47         ALOGE("egl: Failed to get renderControl encoder context\n"); \
     48         return ret; \
     49     }
     50 
     51 //GL extensions
     52 void glEGLImageTargetTexture2DOES(void * self, GLenum target, GLeglImageOES img)
     53 {
     54     (void)self;
     55 
     56     DBG("glEGLImageTargetTexture2DOES v1 target=%#x img=%p", target, img);
     57 
     58     EGLImage_t *image = (EGLImage_t*)img;
     59 
     60     if (image->target == EGL_NATIVE_BUFFER_ANDROID) {
     61         //TODO: check error - we don't have a way to set gl error
     62         android_native_buffer_t* native_buffer = image->native_buffer;
     63 
     64         if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
     65             return;
     66         }
     67 
     68         if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
     69             return;
     70         }
     71 
     72         GET_CONTEXT;
     73         DEFINE_AND_VALIDATE_HOST_CONNECTION();
     74 
     75         ctx->override2DTextureTarget(target);
     76         rcEnc->rcBindTexture(rcEnc,
     77                 ((cb_handle_t *)(native_buffer->handle))->hostHandle);
     78         ctx->restore2DTextureTarget();
     79     }
     80     else if (image->target == EGL_GL_TEXTURE_2D_KHR) {
     81         GET_CONTEXT;
     82         ctx->override2DTextureTarget(target);
     83         GLeglImageOES hostImage = reinterpret_cast<GLeglImageOES>((intptr_t)image->host_egl_image);
     84         ctx->m_glEGLImageTargetTexture2DOES_enc(self, target, hostImage);
     85         ctx->restore2DTextureTarget();
     86     }
     87 }
     88 
     89 void glEGLImageTargetRenderbufferStorageOES(void *self, GLenum target, GLeglImageOES image)
     90 {
     91     (void)self;
     92     (void)target;
     93 
     94     DBG("glEGLImageTargetRenderbufferStorageOES v1 target=%#x image=%p",
     95             target, image);
     96     //TODO: check error - we don't have a way to set gl error
     97     android_native_buffer_t* native_buffer = (android_native_buffer_t*)image;
     98 
     99     if (native_buffer->common.magic != ANDROID_NATIVE_BUFFER_MAGIC) {
    100         return;
    101     }
    102 
    103     if (native_buffer->common.version != sizeof(android_native_buffer_t)) {
    104         return;
    105     }
    106 
    107     DEFINE_AND_VALIDATE_HOST_CONNECTION();
    108     rcEnc->rcBindRenderbuffer(rcEnc,
    109             ((cb_handle_t *)(native_buffer->handle))->hostHandle);
    110 
    111     return;
    112 }
    113 
    114 void * getProcAddress(const char * procname)
    115 {
    116     // search in GL function table
    117     for (int i=0; i<gl_num_funcs; i++) {
    118         if (!strcmp(gl_funcs_by_name[i].name, procname)) {
    119             return gl_funcs_by_name[i].proc;
    120         }
    121     }
    122     return NULL;
    123 }
    124 
    125 void finish()
    126 {
    127     glFinish();
    128 }
    129 
    130 const GLubyte *my_glGetString (void *self, GLenum name)
    131 {
    132     (void)self;
    133 
    134     if (s_egl) {
    135         return (const GLubyte*)s_egl->getGLString(name);
    136     }
    137     return NULL;
    138 }
    139 
    140 void init()
    141 {
    142     GET_CONTEXT;
    143     ctx->m_glEGLImageTargetTexture2DOES_enc = ctx->glEGLImageTargetTexture2DOES;
    144     ctx->glEGLImageTargetTexture2DOES = &glEGLImageTargetTexture2DOES;
    145     ctx->glEGLImageTargetRenderbufferStorageOES = &glEGLImageTargetRenderbufferStorageOES;
    146     ctx->glGetString = &my_glGetString;
    147 }
    148 
    149 extern "C" {
    150 EGLClient_glesInterface * init_emul_gles(EGLClient_eglInterface *eglIface)
    151 {
    152     s_egl = eglIface;
    153 
    154     if (!s_gl) {
    155         s_gl = new EGLClient_glesInterface();
    156         s_gl->getProcAddress = getProcAddress;
    157         s_gl->finish = finish;
    158         s_gl->init = init;
    159     }
    160 
    161     return s_gl;
    162 }
    163 } //extern
    164 
    165 
    166