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GLES2: Only use VBOs for Emscripten (for now). 

This is causing a regression on actual iOS hardware, which we should revisit
 after 2.0.4 ships.
This commit is contained in:
Ryan C. Gordon 2014-12-26 22:30:19 -05:00
parent d8c60342cc
commit f5bbbe417d
1 changed files with 19 additions and 3 deletions
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22
src/render/opengles2/SDL_render_gles2.c
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@ -28,7 +28,20 @@
#include "../../video/SDL_blit.h"
#include "SDL_shaders_gles2.h"
/* To prevent unnecessary window recreation,
/* !!! FIXME: Emscripten makes these into WebGL calls, and WebGL doesn't offer
!!! FIXME: client-side arrays (without an Emscripten compatibility hack,
!!! FIXME: at least), but the current VBO code here is dramatically
!!! FIXME: slower on actual iOS devices, even though the iOS Simulator
!!! FIXME: is okay. Some time after 2.0.4 ships, we should revisit this,
!!! FIXME: fix the performance bottleneck, and make everything use VBOs.
*/
#ifdef __EMSCRIPTEN__
#define SDL_GLES2_USE_VBOS 1
#else
#define SDL_GLES2_USE_VBOS 0
#endif
/* To prevent unnecessary window recreation,
* these should match the defaults selected in SDL_GL_ResetAttributes
*/
#define RENDERER_CONTEXT_MAJOR 2
@ -181,8 +194,10 @@ typedef struct GLES2_DriverContext
GLES2_ProgramCacheEntry *current_program;
Uint8 clear_r, clear_g, clear_b, clear_a;
#if SDL_GLES2_USE_VBOS
GLuint vertex_buffers[4];
GLsizeiptr vertex_buffer_size[4];
#endif
} GLES2_DriverContext;
#define GLES2_MAX_CACHED_PROGRAMS 8
@ -1393,10 +1408,10 @@ GLES2_UpdateVertexBuffer(SDL_Renderer *renderer, GLES2_Attribute attr,
const void *vertexData, size_t dataSizeInBytes)
{
GLES2_DriverContext *data = (GLES2_DriverContext *)renderer->driverdata;
#if 0
#if !SDL_GLES2_USE_VBOS
data->glVertexAttribPointer(attr, attr == GLES2_ATTRIBUTE_ANGLE ? 1 : 2, GL_FLOAT, GL_FALSE, 0, vertexData);
#else
if (!data->vertex_buffers[attr])
data->glGenBuffers(1, &data->vertex_buffers[attr]);
@ -1411,6 +1426,7 @@ GLES2_UpdateVertexBuffer(SDL_Renderer *renderer, GLES2_Attribute attr,
data->glVertexAttribPointer(attr, attr == GLES2_ATTRIBUTE_ANGLE ? 1 : 2, GL_FLOAT, GL_FALSE, 0, 0);
#endif
return 0;
}