bool R_Init (void)
{
R_RegisterSystemVars();
OBJZERO(r_state);
OBJZERO(r_locals);
OBJZERO(r_config);
/* some config default values */
r_config.gl_solid_format = GL_RGB;
r_config.gl_alpha_format = GL_RGBA;
r_config.gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
r_config.gl_filter_max = GL_LINEAR;
r_config.maxTextureSize = 256;
/* initialize OS-specific parts of OpenGL */
if (!Rimp_Init())
return false;
/* get our various GL strings */
r_config.vendorString = (const char *)glGetString(GL_VENDOR);
r_config.rendererString = (const char *)glGetString(GL_RENDERER);
r_config.versionString = (const char *)glGetString(GL_VERSION);
r_config.extensionsString = (const char *)glGetString(GL_EXTENSIONS);
R_Strings_f();
/* sanity checks and card specific hacks */
R_VerifyDriver();
R_EnforceVersion();
R_RegisterImageVars();
/* prevent reloading of some rendering cvars */
Cvar_ClearVars(CVAR_R_MASK);
R_InitExtensions();
R_SetDefaultState();
R_InitPrograms();
R_InitImages();
R_InitMiscTexture();
R_DrawInitLocal();
R_SphereInit();
R_FontInit();
R_InitFBObjects();
R_UpdateDefaultMaterial("","","", NULL);
R_CheckError();
return true;
}
/**
* @brief Re-initializes OpenGL state machine, all textures and renderer variables, this needed when application is put to background on Android.
*/
void R_ReinitOpenglContext (void)
{
/* De-allocate old GL state, these functinos will call glDeleteTexture(), so they should go before everything else */
R_FontCleanCache();
R_ShutdownFBObjects();
R_ShutdownPrograms();
R_BeginBuildingLightmaps(); /* This function will also call glDeleteTexture() */
/* Re-initialize GL state */
R_SetDefaultState();
R_InitPrograms();
/* Re-upload all textures */
R_InitMiscTexture();
R_ReloadImages();
/* Re-upload other GL stuff */
R_InitFBObjects();
R_UpdateDefaultMaterial("", "", "", NULL);
/* Re-upload the battlescape terrain geometry */
if (!qglBindBuffer)
return;
for (int tile = 0; tile < r_numMapTiles; tile++) {
model_t *mod = r_mapTiles[tile];
int vertind = 0, coordind = 0, tangind = 0;
mBspSurface_t *surf = mod->bsp.surfaces;
for (int i = 0; i < mod->bsp.numsurfaces; i++, surf++) {
vertind += 3 * surf->numedges;
coordind += 2 * surf->numedges;
tangind += 4 * surf->numedges;
}
qglGenBuffers(1, &mod->bsp.vertex_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.vertex_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertind * sizeof(GLfloat), mod->bsp.verts, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.texcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.texcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, coordind * sizeof(GLfloat), mod->bsp.texcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.lmtexcoord_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.lmtexcoord_buffer);
qglBufferData(GL_ARRAY_BUFFER, coordind * sizeof(GLfloat), mod->bsp.lmtexcoords, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.normal_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.normal_buffer);
qglBufferData(GL_ARRAY_BUFFER, vertind * sizeof(GLfloat), mod->bsp.normals, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.tangent_buffer);
qglBindBuffer(GL_ARRAY_BUFFER, mod->bsp.tangent_buffer);
qglBufferData(GL_ARRAY_BUFFER, tangind * sizeof(GLfloat), mod->bsp.tangents, GL_STATIC_DRAW);
qglGenBuffers(1, &mod->bsp.index_buffer);
qglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mod->bsp.index_buffer);
qglBufferData(GL_ELEMENT_ARRAY_BUFFER, mod->bsp.numIndexes * sizeof(GLushort), mod->bsp.indexes, GL_STATIC_DRAW);
qglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
for (int i = 0; i < mod->bsp.numsurfaces; i++)
R_CreateSurfaceLightmap(&mod->bsp.surfaces[i]);
}
R_EndBuildingLightmaps();
qglBindBuffer(GL_ARRAY_BUFFER, 0);
}