void gl_deinit_hw_render(gl_t *gl)
{
if (!gl)
return;
context_bind_hw_render(true);
if (gl->hw_render_fbo_init)
glDeleteFramebuffers(gl->textures, gl->hw_render_fbo);
if (gl->hw_render_depth_init)
glDeleteRenderbuffers(gl->textures, gl->hw_render_depth);
gl->hw_render_fbo_init = false;
context_bind_hw_render(false);
}
static void gl2_renderchain_deinit_hw_render(
gl_t *gl,
void *chain_data)
{
gl2_renderchain_t *chain = (gl2_renderchain_t*)chain_data;
if (!gl)
return;
context_bind_hw_render(gl, true);
if (gl->hw_render_fbo_init)
gl2_delete_fb(gl->textures, gl->hw_render_fbo);
if (chain->hw_render_depth_init)
gl2_delete_rb(gl->textures, chain->hw_render_depth);
gl->hw_render_fbo_init = false;
context_bind_hw_render(gl, false);
}
bool gl_init_hw_render(gl_t *gl, unsigned width, unsigned height)
{
GLenum status;
unsigned i;
bool depth = false;
bool stencil = false;
GLint max_fbo_size = 0;
GLint max_renderbuffer_size = 0;
struct retro_hw_render_callback *hwr =
video_driver_get_hw_context();
/* We can only share texture objects through contexts.
* FBOs are "abstract" objects and are not shared. */
context_bind_hw_render(true);
RARCH_LOG("[GL]: Initializing HW render (%u x %u).\n", width, height);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_fbo_size);
glGetIntegerv(RARCH_GL_MAX_RENDERBUFFER_SIZE, &max_renderbuffer_size);
RARCH_LOG("[GL]: Max texture size: %d px, renderbuffer size: %d px.\n",
max_fbo_size, max_renderbuffer_size);
if (!gl_check_capability(GL_CAPS_FBO))
return false;
RARCH_LOG("[GL]: Supports FBO (render-to-texture).\n");
glBindTexture(GL_TEXTURE_2D, 0);
glGenFramebuffers(gl->textures, gl->hw_render_fbo);
depth = hwr->depth;
stencil = hwr->stencil;
#ifdef HAVE_OPENGLES
if (!gl_check_capability(GL_CAPS_PACKED_DEPTH_STENCIL))
return false;
RARCH_LOG("[GL]: Supports Packed depth stencil.\n");
#endif
if (depth)
{
glGenRenderbuffers(gl->textures, gl->hw_render_depth);
gl->hw_render_depth_init = true;
}
for (i = 0; i < gl->textures; i++)
{
glBindFramebuffer(RARCH_GL_FRAMEBUFFER, gl->hw_render_fbo[i]);
glFramebufferTexture2D(RARCH_GL_FRAMEBUFFER,
RARCH_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->texture[i], 0);
if (depth)
{
glBindRenderbuffer(RARCH_GL_RENDERBUFFER, gl->hw_render_depth[i]);
glRenderbufferStorage(RARCH_GL_RENDERBUFFER,
stencil ? RARCH_GL_DEPTH24_STENCIL8 : GL_DEPTH_COMPONENT16,
width, height);
glBindRenderbuffer(RARCH_GL_RENDERBUFFER, 0);
if (stencil)
{
#if defined(HAVE_OPENGLES2) || defined(HAVE_OPENGLES1) || ((defined(__MACH__) && (defined(__ppc__) || defined(__ppc64__))))
/* GLES2 is a bit weird, as always.
* There's no GL_DEPTH_STENCIL_ATTACHMENT like in desktop GL. */
glFramebufferRenderbuffer(RARCH_GL_FRAMEBUFFER,
RARCH_GL_DEPTH_ATTACHMENT,
RARCH_GL_RENDERBUFFER, gl->hw_render_depth[i]);
glFramebufferRenderbuffer(RARCH_GL_FRAMEBUFFER,
RARCH_GL_STENCIL_ATTACHMENT,
RARCH_GL_RENDERBUFFER, gl->hw_render_depth[i]);
#else
/* We use ARB FBO extensions, no need to check. */
glFramebufferRenderbuffer(RARCH_GL_FRAMEBUFFER,
GL_DEPTH_STENCIL_ATTACHMENT,
RARCH_GL_RENDERBUFFER, gl->hw_render_depth[i]);
#endif
}
else
{
glFramebufferRenderbuffer(RARCH_GL_FRAMEBUFFER,
RARCH_GL_DEPTH_ATTACHMENT,
RARCH_GL_RENDERBUFFER, gl->hw_render_depth[i]);
}
}
status = glCheckFramebufferStatus(RARCH_GL_FRAMEBUFFER);
if (status != RARCH_GL_FRAMEBUFFER_COMPLETE)
{
RARCH_ERR("[GL]: Failed to create HW render FBO #%u, error: 0x%u.\n",
i, (unsigned)status);
return false;
}
}
gl_bind_backbuffer();
gl->hw_render_fbo_init = true;
context_bind_hw_render(false);
return true;
}
static bool gl2_renderchain_read_viewport(
void *data,
void *chain_data,
uint8_t *buffer, bool is_idle)
{
unsigned num_pixels = 0;
gl_t *gl = (gl_t*)data;
if (!gl)
return false;
context_bind_hw_render(false);
num_pixels = gl->vp.width * gl->vp.height;
#ifdef HAVE_GL_ASYNC_READBACK
if (gl->pbo_readback_enable)
{
const uint8_t *ptr = NULL;
/* Don't readback if we're in menu mode.
* We haven't buffered up enough frames yet, come back later. */
if (!gl->pbo_readback_valid[gl->pbo_readback_index])
goto error;
gl->pbo_readback_valid[gl->pbo_readback_index] = false;
glBindBuffer(GL_PIXEL_PACK_BUFFER,
gl->pbo_readback[gl->pbo_readback_index]);
#ifdef HAVE_OPENGLES3
/* Slower path, but should work on all implementations at least. */
ptr = (const uint8_t*)glMapBufferRange(GL_PIXEL_PACK_BUFFER,
0, num_pixels * sizeof(uint32_t), GL_MAP_READ_BIT);
if (ptr)
{
unsigned y;
for (y = 0; y < gl->vp.height; y++)
{
video_frame_convert_rgba_to_bgr(
(const void*)ptr,
buffer,
gl->vp.width);
}
}
#else
ptr = (const uint8_t*)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
if (ptr)
{
struct scaler_ctx *ctx = &gl->pbo_readback_scaler;
scaler_ctx_scale_direct(ctx, buffer, ptr);
}
#endif
if (!ptr)
{
RARCH_ERR("[GL]: Failed to map pixel unpack buffer.\n");
goto error;
}
glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
}
else
#endif
{
/* Use slow synchronous readbacks. Use this with plain screenshots
as we don't really care about performance in this case. */
/* GLES2 only guarantees GL_RGBA/GL_UNSIGNED_BYTE
* readbacks so do just that.
* GLES2 also doesn't support reading back data
* from front buffer, so render a cached frame
* and have gl_frame() do the readback while it's
* in the back buffer.
*
* Keep codepath similar for GLES and desktop GL.
*/
gl->readback_buffer_screenshot = malloc(num_pixels * sizeof(uint32_t));
if (!gl->readback_buffer_screenshot)
goto error;
if (!is_idle)
video_driver_cached_frame();
video_frame_convert_rgba_to_bgr(
(const void*)gl->readback_buffer_screenshot,
buffer,
num_pixels);
free(gl->readback_buffer_screenshot);
gl->readback_buffer_screenshot = NULL;
}
context_bind_hw_render(true);
return true;
error:
context_bind_hw_render(true);
return false;
}
