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
36static EGLClient_eglInterface * s_egl = NULL;
37static 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
52void 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
89void 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
114void * 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
125void finish()
126{
127    glFinish();
128}
129
130void getIntegerv(unsigned int pname, int* param)
131{
132    glGetIntegerv((GLenum)pname, (GLint*)param);
133}
134
135const GLubyte *my_glGetString (void *self, GLenum name)
136{
137    (void)self;
138
139    //see ref in https://www.khronos.org/opengles/sdk/docs/man
140    //name in glGetString can be one of the following five values
141    switch (name) {
142        case GL_VERSION:
143        case GL_VENDOR:
144        case GL_RENDERER:
145        case GL_SHADING_LANGUAGE_VERSION:
146        case GL_EXTENSIONS:
147            if (s_egl) {
148                return (const GLubyte*)s_egl->getGLString(name);
149            }
150            break;
151        default:
152            GET_CONTEXT;
153            ctx->setError(GL_INVALID_ENUM);
154            break;
155    }
156    return NULL;
157}
158
159void init()
160{
161    GET_CONTEXT;
162    ctx->m_glEGLImageTargetTexture2DOES_enc = ctx->glEGLImageTargetTexture2DOES;
163    ctx->glEGLImageTargetTexture2DOES = &glEGLImageTargetTexture2DOES;
164    ctx->glEGLImageTargetRenderbufferStorageOES = &glEGLImageTargetRenderbufferStorageOES;
165    ctx->glGetString = &my_glGetString;
166}
167
168extern "C" {
169EGLClient_glesInterface * init_emul_gles(EGLClient_eglInterface *eglIface)
170{
171    s_egl = eglIface;
172
173    if (!s_gl) {
174        s_gl = new EGLClient_glesInterface();
175        s_gl->getProcAddress = getProcAddress;
176        s_gl->finish = finish;
177        s_gl->init = init;
178        s_gl->getIntegerv = getIntegerv;
179    }
180
181    return s_gl;
182}
183} //extern
184
185
186