src/ppapi/lib/gl/gles2/gl2ext_ppapi.c

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/lib/gl/gles2/gl2ext_ppapi.h"
   6
   7 #include <stddef.h>
   8
   9 #ifndef GL_FALSE
  10 #define GL_FALSE 0
  11 #endif  // GL_FALSE
  12
  13 #ifndef GL_TRUE
  14 #define GL_TRUE 1
  15 #endif  // GL_TRUE
  16
  17 #if defined(__GNUC__) && !defined(__APPLE__) && !defined(ANDROID)
  18 #define PP_TLS __thread
  19 #elif defined(_MSC_VER)
  20 #define PP_TLS __declspec(thread)
  21 #else
  22 // TODO(alokp): Fix all other platforms.
  23 #define PP_TLS
  24 #endif
  25
  26 // TODO(alokp): This will need to be thread-safe if we build gles2 as a
  27 // shared library.
  28 static const struct PPB_OpenGLES2* g_gles2_interface = NULL;
  29 static const struct PPB_OpenGLES2InstancedArrays*
  30     g_gles2_instanced_arrays_interface = NULL;
  31 static const struct PPB_OpenGLES2FramebufferBlit*
  32     g_gles2_framebuffer_blit_interface = NULL;
  33 static const struct PPB_OpenGLES2FramebufferMultisample*
  34     g_gles2_framebuffer_multisample_interface = NULL;
  35 static const struct PPB_OpenGLES2ChromiumEnableFeature*
  36     g_gles2_chromium_enable_feature_interface = NULL;
  37 static const struct PPB_OpenGLES2ChromiumMapSub*
  38     g_gles2_chromium_map_sub_interface = NULL;
  39 static const struct PPB_OpenGLES2Query*
  40     g_gles2_query_interface = NULL;
  41 static const struct PPB_OpenGLES2VertexArrayObject*
  42     g_gles2_vertex_array_object_interface = NULL;
  43 static const struct PPB_OpenGLES2DrawBuffers_Dev*
  44     g_gles2_draw_buffers_interface = NULL;
  45
  46 // TODO(alokp): Make sure PP_TLS works on all supported platforms.
  47 static PP_TLS PP_Resource g_current_context = 0;
  48
  49 GLboolean GL_APIENTRY glInitializePPAPI(
  50     PPB_GetInterface get_browser_interface) {
  51   if (!g_gles2_interface) {
  52     g_gles2_interface = get_browser_interface(PPB_OPENGLES2_INTERFACE);
  53   }
  54   if (!g_gles2_instanced_arrays_interface) {
  55     g_gles2_instanced_arrays_interface =
  56         get_browser_interface(PPB_OPENGLES2_INSTANCEDARRAYS_INTERFACE);
  57   }
  58   if (!g_gles2_framebuffer_blit_interface) {
  59     g_gles2_framebuffer_blit_interface =
  60         get_browser_interface(PPB_OPENGLES2_FRAMEBUFFERBLIT_INTERFACE);
  61   }
  62   if (!g_gles2_framebuffer_multisample_interface) {
  63     g_gles2_framebuffer_multisample_interface =
  64         get_browser_interface(
  65             PPB_OPENGLES2_FRAMEBUFFERMULTISAMPLE_INTERFACE);
  66   }
  67   if (!g_gles2_chromium_enable_feature_interface) {
  68     g_gles2_chromium_enable_feature_interface =
  69         get_browser_interface(
  70             PPB_OPENGLES2_CHROMIUMENABLEFEATURE_INTERFACE);
  71   }
  72   if (!g_gles2_chromium_map_sub_interface) {
  73     g_gles2_chromium_map_sub_interface =
  74         get_browser_interface(PPB_OPENGLES2_CHROMIUMMAPSUB_INTERFACE);
  75   }
  76   if (!g_gles2_query_interface) {
  77     g_gles2_query_interface =
  78         get_browser_interface(PPB_OPENGLES2_QUERY_INTERFACE);
  79   }
  80   if (!g_gles2_vertex_array_object_interface) {
  81     g_gles2_vertex_array_object_interface =
  82         get_browser_interface(PPB_OPENGLES2_VERTEXARRAYOBJECT_INTERFACE);
  83   }
  84   if (!g_gles2_draw_buffers_interface) {
  85     g_gles2_draw_buffers_interface =
  86         get_browser_interface(PPB_OPENGLES2_DRAWBUFFERS_DEV_INTERFACE);
  87   }
  88   return g_gles2_interface ? GL_TRUE : GL_FALSE;
  89 }
  90
  91 GLboolean GL_APIENTRY glTerminatePPAPI(void) {
  92   g_gles2_interface = NULL;
  93   return GL_TRUE;
  94 }
  95
  96 void GL_APIENTRY glSetCurrentContextPPAPI(PP_Resource context) {
  97   g_current_context = context;
  98 }
  99
 100 PP_Resource GL_APIENTRY glGetCurrentContextPPAPI(void) {
 101   return g_current_context;
 102 }
 103
 104 const struct PPB_OpenGLES2* GL_APIENTRY glGetInterfacePPAPI(void) {
 105   return g_gles2_interface;
 106 }
 107
 108 const struct PPB_OpenGLES2InstancedArrays* GL_APIENTRY
 109     glGetInstancedArraysInterfacePPAPI(void) {
 110   return g_gles2_instanced_arrays_interface;
 111 }
 112
 113 const struct PPB_OpenGLES2FramebufferBlit* GL_APIENTRY
 114     glGetFramebufferBlitInterfacePPAPI(void) {
 115   return g_gles2_framebuffer_blit_interface;
 116 }
 117
 118 const struct PPB_OpenGLES2FramebufferMultisample* GL_APIENTRY
 119     glGetFramebufferMultisampleInterfacePPAPI(void) {
 120   return g_gles2_framebuffer_multisample_interface;
 121 }
 122
 123 const struct PPB_OpenGLES2ChromiumEnableFeature* GL_APIENTRY
 124     glGetChromiumEnableFeatureInterfacePPAPI(void) {
 125   return g_gles2_chromium_enable_feature_interface;
 126 }
 127
 128 const struct PPB_OpenGLES2ChromiumMapSub* GL_APIENTRY
 129     glGetChromiumMapSubInterfacePPAPI(void) {
 130   return g_gles2_chromium_map_sub_interface;
 131 }
 132
 133 const struct PPB_OpenGLES2Query* GL_APIENTRY
 134     glGetQueryInterfacePPAPI(void) {
 135   return g_gles2_query_interface;
 136 }
 137
 138 const struct PPB_OpenGLES2VertexArrayObject* GL_APIENTRY
 139     glGetVertexArrayObjectInterfacePPAPI(void) {
 140   return g_gles2_vertex_array_object_interface;
 141 }
 142
 143 const struct PPB_OpenGLES2DrawBuffers_Dev* GL_APIENTRY
 144     glGetDrawBuffersInterfacePPAPI(void) {
 145   return g_gles2_draw_buffers_interface;
 146 }