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RetroArch/gfx/gl.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
* Copyright (C) 2011-2012 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef _MSC_VER
#pragma comment(lib, "opengl32")
#endif
#include "../driver.h"
#include "../performance.h"
#include "scaler/scaler.h"
#include <stdint.h>
#include "../libretro.h"
#include <stdio.h>
#include <string.h>
#include "../general.h"
#include <math.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gl_common.h"
#include "gfx_common.h"
#include "gfx_context.h"
#include "../compat/strl.h"
#ifdef HAVE_CG
#include "shader_cg.h"
#endif
#ifdef HAVE_GLSL
#include "shader_glsl.h"
#endif
#include "shader_common.h"
#ifdef __CELLOS_LV2__
#define FPS_COUNTER
#endif
// Used for the last pass when rendering to the back buffer.
const GLfloat vertexes_flipped[] = {
0, 1,
1, 1,
0, 0,
1, 0
};
// Used when rendering to an FBO.
// Texture coords have to be aligned with vertex coordinates.
static const GLfloat vertexes[] = {
0, 0,
1, 0,
0, 1,
1, 1
};
static const GLfloat tex_coords[] = {
0, 0,
1, 0,
0, 1,
1, 1
};
static inline void set_texture_coords(GLfloat *coords, GLfloat xamt, GLfloat yamt)
{
coords[2] = xamt;
coords[6] = xamt;
coords[5] = yamt;
coords[7] = yamt;
}
const GLfloat white_color[] = {
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
};
const GLfloat *vertex_ptr = vertexes_flipped;
const GLfloat *default_vertex_ptr = vertexes_flipped;
#undef LOAD_GL_SYM
#define LOAD_GL_SYM(SYM) if (!pgl##SYM) { \
gfx_ctx_proc_t sym = gl->ctx_driver->get_proc_address("gl" #SYM); \
memcpy(&(pgl##SYM), &sym, sizeof(sym)); \
}
#if defined(HAVE_EGL) && defined(HAVE_OPENGLES2)
static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC pglEGLImageTargetTexture2DOES;
static bool load_eglimage_proc(gl_t *gl)
{
LOAD_GL_SYM(EGLImageTargetTexture2DOES);
return pglEGLImageTargetTexture2DOES;
}
#endif
#ifdef HAVE_FBO
#if defined(_WIN32) && !defined(RARCH_CONSOLE)
static PFNGLGENFRAMEBUFFERSPROC pglGenFramebuffers;
static PFNGLBINDFRAMEBUFFERPROC pglBindFramebuffer;
static PFNGLFRAMEBUFFERTEXTURE2DPROC pglFramebufferTexture2D;
static PFNGLCHECKFRAMEBUFFERSTATUSPROC pglCheckFramebufferStatus;
static PFNGLDELETEFRAMEBUFFERSPROC pglDeleteFramebuffers;
static bool load_fbo_proc(gl_t *gl)
{
LOAD_GL_SYM(GenFramebuffers);
LOAD_GL_SYM(BindFramebuffer);
LOAD_GL_SYM(FramebufferTexture2D);
LOAD_GL_SYM(CheckFramebufferStatus);
LOAD_GL_SYM(DeleteFramebuffers);
return pglGenFramebuffers && pglBindFramebuffer && pglFramebufferTexture2D &&
pglCheckFramebufferStatus && pglDeleteFramebuffers;
}
#elif defined(HAVE_OPENGLES2)
#define pglGenFramebuffers glGenFramebuffers
#define pglBindFramebuffer glBindFramebuffer
#define pglFramebufferTexture2D glFramebufferTexture2D
#define pglCheckFramebufferStatus glCheckFramebufferStatus
#define pglDeleteFramebuffers glDeleteFramebuffers
#define load_fbo_proc(gl) (true)
#elif defined(HAVE_OPENGLES)
#define pglGenFramebuffers glGenFramebuffersOES
#define pglBindFramebuffer glBindFramebufferOES
#define pglFramebufferTexture2D glFramebufferTexture2DOES
#define pglCheckFramebufferStatus glCheckFramebufferStatusOES
#define pglDeleteFramebuffers glDeleteFramebuffersOES
#define GL_FRAMEBUFFER GL_FRAMEBUFFER_OES
#define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
#define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_OES
#define load_fbo_proc(gl) (true)
#else
#define pglGenFramebuffers glGenFramebuffers
#define pglBindFramebuffer glBindFramebuffer
#define pglFramebufferTexture2D glFramebufferTexture2D
#define pglCheckFramebufferStatus glCheckFramebufferStatus
#define pglDeleteFramebuffers glDeleteFramebuffers
#define load_fbo_proc(gl) (true)
#endif
#endif
#ifdef _WIN32
PFNGLCLIENTACTIVETEXTUREPROC pglClientActiveTexture;
PFNGLACTIVETEXTUREPROC pglActiveTexture;
static PFNGLGENBUFFERSPROC pglGenBuffers;
static PFNGLGENBUFFERSPROC pglDeleteBuffers;
static PFNGLBINDBUFFERPROC pglBindBuffer;
static PFNGLBUFFERSUBDATAPROC pglBufferSubData;
static PFNGLBUFFERDATAPROC pglBufferData;
static PFNGLMAPBUFFERPROC pglMapBuffer;
static PFNGLUNMAPBUFFERPROC pglUnmapBuffer;
static inline bool load_gl_proc_win32(gl_t *gl)
{
LOAD_GL_SYM(ClientActiveTexture);
LOAD_GL_SYM(ActiveTexture);
LOAD_GL_SYM(GenBuffers);
LOAD_GL_SYM(DeleteBuffers);
LOAD_GL_SYM(BindBuffer);
LOAD_GL_SYM(BufferSubData);
LOAD_GL_SYM(BufferData);
LOAD_GL_SYM(MapBuffer);
LOAD_GL_SYM(UnmapBuffer);
return pglClientActiveTexture && pglActiveTexture &&
pglGenBuffers && pglDeleteBuffers &&
pglBindBuffer && pglBufferSubData && pglBufferData &&
pglMapBuffer && pglUnmapBuffer;
}
#else
#define pglGenBuffers glGenBuffers
#define pglDeleteBuffers glDeleteBuffers
#define pglBindBuffer glBindBuffer
#define pglBufferSubData glBufferSubData
#define pglBufferData glBufferData
#define pglMapBuffer glMapBuffer
#define pglUnmapBuffer glUnmapBuffer
#endif
////////////////// Shaders
#ifdef HAVE_OPENGLES2
static bool gl_shader_init(gl_t *gl) // We always need a shader alive in GLES2.
{
const char *shader_path = NULL;
if ((g_settings.video.shader_type == RARCH_SHADER_AUTO || g_settings.video.shader_type == RARCH_SHADER_BSNES)
&& *g_settings.video.bsnes_shader_path)
shader_path = g_settings.video.bsnes_shader_path;
gl->shader = &gl_glsl_backend;
return gl->shader->init(shader_path);
}
#else
static bool gl_shader_init(gl_t *gl)
{
const gl_shader_backend_t *backend = NULL;
const char *shader_path = NULL;
switch (g_settings.video.shader_type)
{
case RARCH_SHADER_AUTO:
{
if (*g_settings.video.cg_shader_path && *g_settings.video.bsnes_shader_path)
RARCH_WARN("Both Cg and bSNES XML shader are defined in config file. Cg shader will be selected by default.\n");
#ifdef HAVE_CG
if (*g_settings.video.cg_shader_path)
{
backend = &gl_cg_backend;
shader_path = g_settings.video.cg_shader_path;
}
#endif
#ifdef HAVE_XML
if (*g_settings.video.bsnes_shader_path)
{
backend = &gl_glsl_backend;
shader_path = g_settings.video.bsnes_shader_path;
}
#endif
break;
}
#ifdef HAVE_CG
case RARCH_SHADER_CG:
backend = &gl_cg_backend;
shader_path = g_settings.video.cg_shader_path;
break;
#endif
#ifdef HAVE_XML
case RARCH_SHADER_BSNES:
backend = &gl_glsl_backend;
shader_path = g_settings.video.bsnes_shader_path;
break;
#endif
default:
break;
}
if (!backend)
return true;
gl->shader = backend;
return gl->shader->init(shader_path);
}
#endif
void gl_shader_use(gl_t *gl, unsigned index)
{
if (gl->shader)
gl->shader->use(index);
}
static inline void gl_shader_deinit(gl_t *gl)
{
if (gl->shader)
gl->shader->deinit();
gl->shader = NULL;
}
#ifndef NO_GL_FF_VERTEX
static void gl_set_coords(const struct gl_coords *coords)
{
pglClientActiveTexture(GL_TEXTURE0);
glVertexPointer(2, GL_FLOAT, 0, coords->vertex);
glEnableClientState(GL_VERTEX_ARRAY);
glColorPointer(4, GL_FLOAT, 0, coords->color);
glEnableClientState(GL_COLOR_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, coords->tex_coord);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
pglClientActiveTexture(GL_TEXTURE1);
glTexCoordPointer(2, GL_FLOAT, 0, coords->lut_tex_coord);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
pglClientActiveTexture(GL_TEXTURE0);
}
#endif
#ifndef NO_GL_FF_MATRIX
static void gl_set_mvp(const math_matrix *mat)
{
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(mat->data);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
#endif
void gl_shader_set_coords(gl_t *gl, const struct gl_coords *coords, const math_matrix *mat)
{
bool ret_coords = false;
bool ret_mvp = false;
(void)ret_coords;
(void)ret_mvp;
if (gl->shader)
ret_coords = gl->shader->set_coords(coords);
if (gl->shader)
ret_mvp = gl->shader->set_mvp(mat);
// Fall back to FF-style if needed and possible.
#ifndef NO_GL_FF_VERTEX
if (!ret_coords)
gl_set_coords(coords);
#endif
#ifndef NO_GL_FF_MATRIX
if (!ret_mvp)
gl_set_mvp(mat);
#endif
}
static inline void gl_shader_set_params(gl_t *gl, unsigned width, unsigned height,
unsigned tex_width, unsigned tex_height,
unsigned out_width, unsigned out_height,
unsigned frame_count,
const struct gl_tex_info *info,
const struct gl_tex_info *prev_info,
const struct gl_tex_info *fbo_info, unsigned fbo_info_cnt)
{
if (gl->shader)
{
gl->shader->set_params(width, height,
tex_width, tex_height,
out_width, out_height,
frame_count, info, prev_info, fbo_info, fbo_info_cnt);
}
}
static inline unsigned gl_shader_num(gl_t *gl)
{
if (gl->shader)
return gl->shader->num_shaders();
else
return 0;
}
static bool gl_shader_filter_type(gl_t *gl, unsigned index, bool *smooth)
{
if (gl->shader)
return gl->shader->filter_type(index, smooth);
else
return false;
}
#ifdef HAVE_FBO
static void gl_shader_scale(gl_t *gl, unsigned index, struct gl_fbo_scale *scale)
{
scale->valid = false;
if (gl->shader)
gl->shader->shader_scale(index, scale);
}
static void gl_compute_fbo_geometry(gl_t *gl, unsigned width, unsigned height,
unsigned vp_width, unsigned vp_height)
{
unsigned last_width = width;
unsigned last_height = height;
unsigned last_max_width = gl->tex_w;
unsigned last_max_height = gl->tex_h;
GLint max_size = 0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
bool size_modified = false;
// Calculate viewports for FBOs.
for (int i = 0; i < gl->fbo_pass; i++)
{
switch (gl->fbo_scale[i].type_x)
{
case RARCH_SCALE_INPUT:
gl->fbo_rect[i].img_width = last_width * gl->fbo_scale[i].scale_x;
gl->fbo_rect[i].max_img_width = last_max_width * gl->fbo_scale[i].scale_x;
break;
case RARCH_SCALE_ABSOLUTE:
gl->fbo_rect[i].img_width = gl->fbo_rect[i].max_img_width = gl->fbo_scale[i].abs_x;
break;
case RARCH_SCALE_VIEWPORT:
gl->fbo_rect[i].img_width = gl->fbo_rect[i].max_img_width = gl->fbo_scale[i].scale_x * vp_width;
break;
default:
break;
}
switch (gl->fbo_scale[i].type_y)
{
case RARCH_SCALE_INPUT:
gl->fbo_rect[i].img_height = last_height * gl->fbo_scale[i].scale_y;
gl->fbo_rect[i].max_img_height = last_max_height * gl->fbo_scale[i].scale_y;
break;
case RARCH_SCALE_ABSOLUTE:
gl->fbo_rect[i].img_height = gl->fbo_rect[i].max_img_height = gl->fbo_scale[i].abs_y;
break;
case RARCH_SCALE_VIEWPORT:
gl->fbo_rect[i].img_height = gl->fbo_rect[i].max_img_height = gl->fbo_scale[i].scale_y * vp_height;
break;
default:
break;
}
if (gl->fbo_rect[i].img_width > (unsigned)max_size)
{
size_modified = true;
gl->fbo_rect[i].img_width = max_size;
}
if (gl->fbo_rect[i].img_height > (unsigned)max_size)
{
size_modified = true;
gl->fbo_rect[i].img_height = max_size;
}
if (gl->fbo_rect[i].max_img_width > (unsigned)max_size)
{
size_modified = true;
gl->fbo_rect[i].max_img_width = max_size;
}
if (gl->fbo_rect[i].max_img_height > (unsigned)max_size)
{
size_modified = true;
gl->fbo_rect[i].max_img_height = max_size;
}
if (size_modified)
RARCH_WARN("FBO textures exceeded maximum size of GPU (%ux%u). Resizing to fit.\n", max_size, max_size);
last_width = gl->fbo_rect[i].img_width;
last_height = gl->fbo_rect[i].img_height;
last_max_width = gl->fbo_rect[i].max_img_width;
last_max_height = gl->fbo_rect[i].max_img_height;
}
}
static void gl_create_fbo_textures(gl_t *gl)
{
glGenTextures(gl->fbo_pass, gl->fbo_texture);
GLuint base_filt = g_settings.video.second_pass_smooth ? GL_LINEAR : GL_NEAREST;
for (int i = 0; i < gl->fbo_pass; i++)
{
glBindTexture(GL_TEXTURE_2D, gl->fbo_texture[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, gl->border_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, gl->border_type);
GLuint filter_type = base_filt;
bool smooth = false;
if (gl_shader_filter_type(gl, i + 2, &smooth))
filter_type = smooth ? GL_LINEAR : GL_NEAREST;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter_type);
glTexImage2D(GL_TEXTURE_2D,
0, RARCH_GL_INTERNAL_FORMAT32, gl->fbo_rect[i].width, gl->fbo_rect[i].height,
0, RARCH_GL_TEXTURE_TYPE32,
RARCH_GL_FORMAT32, NULL);
}
glBindTexture(GL_TEXTURE_2D, 0);
}
static bool gl_create_fbo_targets(gl_t *gl)
{
glBindTexture(GL_TEXTURE_2D, 0);
pglGenFramebuffers(gl->fbo_pass, gl->fbo);
for (int i = 0; i < gl->fbo_pass; i++)
{
pglBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[i]);
pglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->fbo_texture[i], 0);
GLenum status = pglCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
goto error;
}
return true;
error:
pglDeleteFramebuffers(gl->fbo_pass, gl->fbo);
RARCH_ERR("Failed to set up frame buffer objects. Multi-pass shading will not work.\n");
return false;
}
void gl_deinit_fbo(gl_t *gl)
{
if (gl->fbo_inited)
{
glDeleteTextures(gl->fbo_pass, gl->fbo_texture);
pglDeleteFramebuffers(gl->fbo_pass, gl->fbo);
memset(gl->fbo_texture, 0, sizeof(gl->fbo_texture));
memset(gl->fbo, 0, sizeof(gl->fbo));
gl->fbo_inited = false;
gl->fbo_pass = 0;
}
}
void gl_init_fbo(gl_t *gl, unsigned width, unsigned height)
{
// No need to use FBOs.
if (!g_settings.video.render_to_texture && gl_shader_num_func(gl) == 0)
return;
struct gl_fbo_scale scale, scale_last;
gl_shader_scale(gl, 1, &scale);
gl_shader_scale(gl, gl_shader_num_func(gl), &scale_last);
// No need to use FBOs.
if (gl_shader_num_func(gl) == 1 && !scale.valid && !g_settings.video.render_to_texture)
return;
if (!load_fbo_proc(gl))
{
RARCH_ERR("Failed to locate FBO functions. Won't be able to use render-to-texture.\n");
return;
}
gl->fbo_pass = gl_shader_num_func(gl) - 1;
if (scale_last.valid)
gl->fbo_pass++;
if (gl->fbo_pass <= 0)
gl->fbo_pass = 1;
if (!scale.valid)
{
scale.scale_x = g_settings.video.fbo.scale_x;
scale.scale_y = g_settings.video.fbo.scale_y;
scale.type_x = scale.type_y = RARCH_SCALE_INPUT;
scale.valid = true;
}
gl->fbo_scale[0] = scale;
for (int i = 1; i < gl->fbo_pass; i++)
{
gl_shader_scale(gl, i + 1, &gl->fbo_scale[i]);
if (!gl->fbo_scale[i].valid)
{
gl->fbo_scale[i].scale_x = gl->fbo_scale[i].scale_y = 1.0f;
gl->fbo_scale[i].type_x = gl->fbo_scale[i].type_y = RARCH_SCALE_INPUT;
gl->fbo_scale[i].valid = true;
}
}
gl_compute_fbo_geometry(gl, width, height, gl->win_width, gl->win_height);
for (int i = 0; i < gl->fbo_pass; i++)
{
gl->fbo_rect[i].width = next_pow2(gl->fbo_rect[i].img_width);
gl->fbo_rect[i].height = next_pow2(gl->fbo_rect[i].img_height);
RARCH_LOG("Creating FBO %d @ %ux%u\n", i, gl->fbo_rect[i].width, gl->fbo_rect[i].height);
}
gl_create_fbo_textures(gl);
if (!gl_create_fbo_targets(gl))
{
glDeleteTextures(gl->fbo_pass, gl->fbo_texture);
RARCH_ERR("Failed to create FBO targets. Will continue without FBO.\n");
return;
}
gl->fbo_inited = true;
}
#endif
////////////
void gl_set_projection(gl_t *gl, struct gl_ortho *ortho, bool allow_rotate)
{
#ifdef RARCH_CONSOLE
if (g_extern.console.screen.state.overscan.enable)
{
ortho->left = -g_extern.console.screen.overscan_amount / 2;
ortho->right = 1 + g_extern.console.screen.overscan_amount / 2;
ortho->bottom = -g_extern.console.screen.overscan_amount / 2;
}
#endif
// Calculate projection.
math_matrix proj;
matrix_ortho(&proj, ortho->left, ortho->right,
ortho->bottom, ortho->top, ortho->znear, ortho->zfar);
if (allow_rotate)
{
math_matrix rot;
matrix_rotate_z(&rot, M_PI * gl->rotation / 180.0f);
matrix_multiply(&proj, &rot, &proj);
}
gl->mvp = proj;
gl_shader_set_coords_func(gl, &gl->coords, &gl->mvp);
}
void gl_set_viewport(gl_t *gl, unsigned width, unsigned height, bool force_full, bool allow_rotate)
{
unsigned x = 0, y = 0;
struct gl_ortho ortho = {0, 1, 0, 1, -1, 1};
if (gl->keep_aspect && !force_full)
{
float desired_aspect = g_settings.video.aspect_ratio;
float device_aspect;
if (gl->ctx_driver->translate_aspect)
device_aspect = context_translate_aspect_func(width, height);
else
device_aspect = (float)width / height;
float delta;
#ifdef RARCH_CONSOLE
if (g_settings.video.aspect_ratio_idx == ASPECT_RATIO_CUSTOM)
{
x = g_extern.console.screen.viewports.custom_vp.x;
y = g_extern.console.screen.viewports.custom_vp.y;
width = g_extern.console.screen.viewports.custom_vp.width;
height = g_extern.console.screen.viewports.custom_vp.height;
}
else
#endif
{
if (fabs(device_aspect - desired_aspect) < 0.0001)
{
// If the aspect ratios of screen and desired aspect ratio are sufficiently equal (floating point stuff),
// assume they are actually equal.
}
else if (device_aspect > desired_aspect)
{
delta = (desired_aspect / device_aspect - 1.0) / 2.0 + 0.5;
x = (unsigned)(width * (0.5 - delta));
width = (unsigned)(2.0 * width * delta);
}
else
{
delta = (device_aspect / desired_aspect - 1.0) / 2.0 + 0.5;
y = (unsigned)(height * (0.5 - delta));
height = (unsigned)(2.0 * height * delta);
}
}
}
glViewport(x, y, width, height);
gl->vp.x = x;
gl->vp.y = y;
gl->vp.width = width;
gl->vp.height = height;
gl_set_projection(gl, &ortho, allow_rotate);
// Set last backbuffer viewport.
if (!force_full)
{
gl->vp_out_width = width;
gl->vp_out_height = height;
}
//RARCH_LOG("Setting viewport @ %ux%u\n", width, height);
}
static void gl_set_rotation(void *data, unsigned rotation)
{
struct gl_ortho ortho = {0, 1, 0, 1, -1, 1};
gl_t *gl = (gl_t*)driver.video_data;
gl->rotation = 90 * rotation;
gl_set_projection(gl, &ortho, true);
}
#ifdef HAVE_FBO
static inline void gl_start_frame_fbo(gl_t *gl)
{
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
pglBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[0]);
gl_set_viewport(gl, gl->fbo_rect[0].img_width, gl->fbo_rect[0].img_height, true, false);
// Need to preserve the "flipped" state when in FBO as well to have
// consistent texture coordinates.
// We will "flip" it in place on last pass.
gl->coords.vertex = vertexes;
}
static void gl_check_fbo_dimensions(gl_t *gl)
{
// Check if we have to recreate our FBO textures.
for (int i = 0; i < gl->fbo_pass; i++)
{
// Check proactively since we might suddently get sizes of tex_w width or tex_h height.
if (gl->fbo_rect[i].max_img_width > gl->fbo_rect[i].width ||
gl->fbo_rect[i].max_img_height > gl->fbo_rect[i].height)
{
unsigned img_width = gl->fbo_rect[i].max_img_width;
unsigned img_height = gl->fbo_rect[i].max_img_height;
unsigned max = img_width > img_height ? img_width : img_height;
unsigned pow2_size = next_pow2(max);
gl->fbo_rect[i].width = gl->fbo_rect[i].height = pow2_size;
pglBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[i]);
glBindTexture(GL_TEXTURE_2D, gl->fbo_texture[i]);
glTexImage2D(GL_TEXTURE_2D,
0, RARCH_GL_INTERNAL_FORMAT32, gl->fbo_rect[i].width, gl->fbo_rect[i].height,
0, RARCH_GL_TEXTURE_TYPE32,
RARCH_GL_FORMAT32, NULL);
pglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->fbo_texture[i], 0);
GLenum status = pglCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
RARCH_WARN("Failed to reinit FBO texture.\n");
RARCH_LOG("Recreating FBO texture #%d: %ux%u\n", i, gl->fbo_rect[i].width, gl->fbo_rect[i].height);
}
}
}
static void gl_frame_fbo(gl_t *gl, const struct gl_tex_info *tex_info)
{
GLfloat fbo_tex_coords[8] = {0.0f};
// Render the rest of our passes.
gl->coords.tex_coord = fbo_tex_coords;
// It's kinda handy ... :)
const struct gl_fbo_rect *prev_rect;
const struct gl_fbo_rect *rect;
struct gl_tex_info *fbo_info;
struct gl_tex_info fbo_tex_info[MAX_SHADERS];
unsigned fbo_tex_info_cnt = 0;
// Calculate viewports, texture coordinates etc, and render all passes from FBOs, to another FBO.
for (int i = 1; i < gl->fbo_pass; i++)
{
prev_rect = &gl->fbo_rect[i - 1];
rect = &gl->fbo_rect[i];
fbo_info = &fbo_tex_info[i - 1];
GLfloat xamt = (GLfloat)prev_rect->img_width / prev_rect->width;
GLfloat yamt = (GLfloat)prev_rect->img_height / prev_rect->height;
set_texture_coords(fbo_tex_coords, xamt, yamt);
fbo_info->tex = gl->fbo_texture[i - 1];
fbo_info->input_size[0] = prev_rect->img_width;
fbo_info->input_size[1] = prev_rect->img_height;
fbo_info->tex_size[0] = prev_rect->width;
fbo_info->tex_size[1] = prev_rect->height;
memcpy(fbo_info->coord, fbo_tex_coords, sizeof(fbo_tex_coords));
pglBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[i]);
gl_shader_use_func(gl, i + 1);
glBindTexture(GL_TEXTURE_2D, gl->fbo_texture[i - 1]);
glClear(GL_COLOR_BUFFER_BIT);
// Render to FBO with certain size.
gl_set_viewport(gl, rect->img_width, rect->img_height, true, false);
gl_shader_set_params_func(gl, prev_rect->img_width, prev_rect->img_height,
prev_rect->width, prev_rect->height,
gl->vp.width, gl->vp.height, g_extern.frame_count,
tex_info, gl->prev_info, fbo_tex_info, fbo_tex_info_cnt);
gl_shader_set_coords_func(gl, &gl->coords, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
fbo_tex_info_cnt++;
}
// Render our last FBO texture directly to screen.
prev_rect = &gl->fbo_rect[gl->fbo_pass - 1];
GLfloat xamt = (GLfloat)prev_rect->img_width / prev_rect->width;
GLfloat yamt = (GLfloat)prev_rect->img_height / prev_rect->height;
set_texture_coords(fbo_tex_coords, xamt, yamt);
// Render our FBO texture to back buffer.
pglBindFramebuffer(GL_FRAMEBUFFER, 0);
gl_shader_use_func(gl, gl->fbo_pass + 1);
glBindTexture(GL_TEXTURE_2D, gl->fbo_texture[gl->fbo_pass - 1]);
glClear(GL_COLOR_BUFFER_BIT);
gl_set_viewport(gl, gl->win_width, gl->win_height, false, true);
gl_shader_set_params_func(gl, prev_rect->img_width, prev_rect->img_height,
prev_rect->width, prev_rect->height,
gl->vp.width, gl->vp.height, g_extern.frame_count,
tex_info, gl->prev_info, fbo_tex_info, fbo_tex_info_cnt);
gl->coords.vertex = vertex_ptr;
gl_shader_set_coords_func(gl, &gl->coords, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
gl->coords.tex_coord = gl->tex_coords;
}
#endif
static void gl_update_resize(gl_t *gl)
{
#ifdef HAVE_FBO
if (!gl->fbo_inited)
gl_set_viewport(gl, gl->win_width, gl->win_height, false, true);
else
{
gl_check_fbo_dimensions(gl);
// Go back to what we're supposed to do, render to FBO #0 :D
gl_start_frame_fbo(gl);
}
#else
gl_set_viewport(gl, gl->win_width, gl->win_height, false, true);
#endif
}
static void gl_update_input_size(gl_t *gl, unsigned width, unsigned height, unsigned pitch)
{
// Res change. Need to clear out texture.
if ((width != gl->last_width[gl->tex_index] || height != gl->last_height[gl->tex_index]) && gl->empty_buf)
{
gl->last_width[gl->tex_index] = width;
gl->last_height[gl->tex_index] = height;
#if defined(HAVE_PSGL)
glBufferSubData(GL_TEXTURE_REFERENCE_BUFFER_SCE,
gl->tex_w * gl->tex_h * gl->tex_index * gl->base_size,
gl->tex_w * gl->tex_h * gl->base_size,
gl->empty_buf);
#else
glPixelStorei(GL_UNPACK_ALIGNMENT, get_alignment(width * sizeof(uint32_t)));
glTexSubImage2D(GL_TEXTURE_2D,
0, 0, 0, gl->tex_w, gl->tex_h, gl->texture_type,
gl->texture_fmt, gl->empty_buf);
#endif
GLfloat xamt = (GLfloat)width / gl->tex_w;
GLfloat yamt = (GLfloat)height / gl->tex_h;
set_texture_coords(gl->tex_coords, xamt, yamt);
}
// We might have used different texture coordinates last frame. Edge case if resolution changes very rapidly.
else if (width != gl->last_width[(gl->tex_index - 1) & TEXTURES_MASK] ||
height != gl->last_height[(gl->tex_index - 1) & TEXTURES_MASK])
{
GLfloat xamt = (GLfloat)width / gl->tex_w;
GLfloat yamt = (GLfloat)height / gl->tex_h;
set_texture_coords(gl->tex_coords, xamt, yamt);
}
}
// It is *much* faster (order of mangnitude on my setup) to use a custom SIMD-optimized conversion routine than letting GL do it :(
#if !defined(HAVE_PSGL) && !defined(HAVE_OPENGLES2)
static inline void gl_convert_frame_rgb16_32(gl_t *gl, void *output, const void *input, int width, int height, int in_pitch)
{
if (width != gl->scaler.in_width || height != gl->scaler.in_height)
{
gl->scaler.in_width = width;
gl->scaler.in_height = height;
gl->scaler.out_width = width;
gl->scaler.out_height = height;
gl->scaler.in_fmt = SCALER_FMT_RGB565;
gl->scaler.out_fmt = SCALER_FMT_ARGB8888;
gl->scaler.scaler_type = SCALER_TYPE_POINT;
scaler_ctx_gen_filter(&gl->scaler);
}
gl->scaler.in_stride = in_pitch;
gl->scaler.out_stride = width * sizeof(uint32_t);
scaler_ctx_scale(&gl->scaler, output, input);
}
#endif
static void gl_init_textures_data(gl_t *gl)
{
for (unsigned i = 0; i < TEXTURES; i++)
{
gl->last_width[i] = gl->tex_w;
gl->last_height[i] = gl->tex_h;
}
for (unsigned i = 0; i < TEXTURES; i++)
{
gl->prev_info[i].tex = gl->texture[0];
gl->prev_info[i].input_size[0] = gl->tex_w;
gl->prev_info[i].tex_size[0] = gl->tex_w;
gl->prev_info[i].input_size[1] = gl->tex_h;
gl->prev_info[i].tex_size[1] = gl->tex_h;
memcpy(gl->prev_info[i].coord, tex_coords, sizeof(tex_coords));
}
}
#if defined(HAVE_PSGL)
static inline void gl_copy_frame(gl_t *gl, const void *frame, unsigned width, unsigned height, unsigned pitch)
{
size_t buffer_addr = gl->tex_w * gl->tex_h * gl->tex_index * gl->base_size;
size_t buffer_stride = gl->tex_w * gl->base_size;
const uint8_t *frame_copy = frame;
size_t frame_copy_size = width * gl->base_size;
uint8_t *buffer = (uint8_t*)glMapBuffer(GL_TEXTURE_REFERENCE_BUFFER_SCE, GL_WRITE_ONLY) + buffer_addr;
for (unsigned h = 0; h < height; h++, buffer += buffer_stride, frame_copy += pitch)
memcpy(buffer, frame_copy, frame_copy_size);
glUnmapBuffer(GL_TEXTURE_REFERENCE_BUFFER_SCE);
}
static void gl_init_textures(gl_t *gl, const video_info_t *video)
{
if (!gl->pbo)
glGenBuffers(1, &gl->pbo);
glBindBuffer(GL_TEXTURE_REFERENCE_BUFFER_SCE, gl->pbo);
glBufferData(GL_TEXTURE_REFERENCE_BUFFER_SCE,
gl->tex_w * gl->tex_h * gl->base_size * TEXTURES, NULL, GL_STREAM_DRAW);
glGenTextures(TEXTURES, gl->texture);
for (unsigned i = 0; i < TEXTURES; i++)
{
glBindTexture(GL_TEXTURE_2D, gl->texture[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, gl->border_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, gl->border_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl->tex_filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl->tex_filter);
glTextureReferenceSCE(GL_TEXTURE_2D, 1,
gl->tex_w, gl->tex_h, 0,
gl->internal_fmt,
gl->tex_w * gl->base_size,
gl->tex_w * gl->tex_h * i * gl->base_size);
}
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
}
#else
static inline void gl_copy_frame(gl_t *gl, const void *frame, unsigned width, unsigned height, unsigned pitch)
{
#ifdef HAVE_OPENGLES2
#ifdef HAVE_EGL
if (gl->egl_images)
{
EGLImageKHR img = 0;
bool new_egl = context_write_egl_image_func(frame, width, height, pitch, (gl->base_size == 4), gl->tex_index, &img);
if (img == EGL_NO_IMAGE_KHR)
{
RARCH_ERR("[GL]: Failed to create EGL image.\n");
return;
}
if (new_egl)
pglEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)img);
}
else
#endif
{
// No GL_UNPACK_ROW_LENGTH ;(
unsigned pitch_width = pitch / gl->base_size;
if (width == pitch_width) // Happy path :D
{
glTexSubImage2D(GL_TEXTURE_2D,
0, 0, 0, width, height, gl->texture_type,
gl->texture_fmt, frame);
}
else // Slower path.
{
const unsigned line_bytes = width * gl->base_size;
uint8_t *dst = (uint8_t*)gl->conv_buffer; // This buffer is preallocated for this purpose.
const uint8_t *src = (const uint8_t*)frame;
for (unsigned h = 0; h < height; h++, src += pitch, dst += line_bytes)
memcpy(dst, src, line_bytes);
glTexSubImage2D(GL_TEXTURE_2D,
0, 0, 0, width, height, gl->texture_type,
gl->texture_fmt, gl->conv_buffer);
}
}
#else
glPixelStorei(GL_UNPACK_ALIGNMENT, get_alignment(pitch));
if (gl->base_size == 2)
{
// Always use 32-bit textures on desktop GL.
gl_convert_frame_rgb16_32(gl, gl->conv_buffer, frame, width, height, pitch);
glTexSubImage2D(GL_TEXTURE_2D,
0, 0, 0, width, height, gl->texture_type,
gl->texture_fmt, gl->conv_buffer);
}
else
{
glPixelStorei(GL_UNPACK_ROW_LENGTH, pitch / gl->base_size);
glTexSubImage2D(GL_TEXTURE_2D,
0, 0, 0, width, height, gl->texture_type,
gl->texture_fmt, frame);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
#endif
}
static void gl_init_textures(gl_t *gl, const video_info_t *video)
{
#if defined(HAVE_EGL) && defined(HAVE_OPENGLES2)
gl->egl_images = load_eglimage_proc(gl) && context_init_egl_image_buffer_func(video);
#else
(void)video;
#endif
glGenTextures(TEXTURES, gl->texture);
for (unsigned i = 0; i < TEXTURES; i++)
{
glBindTexture(GL_TEXTURE_2D, gl->texture[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, gl->border_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, gl->border_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl->tex_filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl->tex_filter);
if (!gl->egl_images)
{
glTexImage2D(GL_TEXTURE_2D,
0, gl->internal_fmt, gl->tex_w, gl->tex_h, 0, gl->texture_type,
gl->texture_fmt, gl->empty_buf ? gl->empty_buf : NULL);
}
}
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
}
#endif
static inline void gl_set_prev_texture(gl_t *gl, const struct gl_tex_info *tex_info)
{
memmove(gl->prev_info + 1, gl->prev_info, sizeof(*tex_info) * (TEXTURES - 1));
memcpy(&gl->prev_info[0], tex_info, sizeof(*tex_info));
}
static inline void gl_set_shader_viewport(gl_t *gl, unsigned shader)
{
gl_shader_use_func(gl, shader);
gl_set_viewport(gl, gl->win_width, gl->win_height, false, true);
}
#if !defined(HAVE_OPENGLES) && defined(HAVE_FFMPEG)
static void gl_pbo_async_readback(gl_t *gl)
{
pglBindBuffer(GL_PIXEL_PACK_BUFFER, gl->pbo_readback[gl->pbo_readback_index++]);
gl->pbo_readback_index &= 3;
// If set, we 3 rendered frames already buffered up.
gl->pbo_readback_valid |= gl->pbo_readback_index == 0;
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(gl->vp.width * sizeof(uint32_t)));
// Read asynchronously into PBO buffer.
RARCH_PERFORMANCE_INIT(async_readback);
RARCH_PERFORMANCE_START(async_readback);
glReadPixels(gl->vp.x, gl->vp.y,
gl->vp.width, gl->vp.height,
GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
RARCH_PERFORMANCE_STOP(async_readback);
pglBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
}
#endif
static bool gl_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
{
RARCH_PERFORMANCE_INIT(frame_run);
RARCH_PERFORMANCE_START(frame_run);
gl_t *gl = (gl_t*)data;
gl_shader_use_func(gl, 1);
#ifdef HAVE_FBO
// Render to texture in first pass.
if (gl->fbo_inited)
{
// Recompute FBO geometry.
// When width/height changes or window sizes change, we have to recalcuate geometry of our FBO.
gl_compute_fbo_geometry(gl, width, height, gl->vp_out_width, gl->vp_out_height);
gl_start_frame_fbo(gl);
}
#endif
if (gl->should_resize)
{
gl->should_resize = false;
context_set_resize_func(gl->win_width, gl->win_height);
// On resize, we might have to recreate our FBOs due to "Viewport" scale, and set a new viewport.
gl_update_resize(gl);
}
if (frame) // Can be NULL for frame dupe / NULL render.
{
gl->tex_index = (gl->tex_index + 1) & TEXTURES_MASK;
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
gl_update_input_size(gl, width, height, pitch);
RARCH_PERFORMANCE_INIT(copy_frame);
RARCH_PERFORMANCE_START(copy_frame);
gl_copy_frame(gl, frame, width, height, pitch);
RARCH_PERFORMANCE_STOP(copy_frame);
}
else
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
struct gl_tex_info tex_info = {0};
tex_info.tex = gl->texture[gl->tex_index];
tex_info.input_size[0] = width;
tex_info.input_size[1] = height;
tex_info.tex_size[0] = gl->tex_w;
tex_info.tex_size[1] = gl->tex_h;
memcpy(tex_info.coord, gl->tex_coords, sizeof(gl->tex_coords));
glClear(GL_COLOR_BUFFER_BIT);
gl_shader_set_params_func(gl, width, height,
gl->tex_w, gl->tex_h,
gl->vp.width, gl->vp.height,
g_extern.frame_count,
&tex_info, gl->prev_info, NULL, 0);
gl_shader_set_coords_func(gl, &gl->coords, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
#ifdef HAVE_FBO
if (gl->fbo_inited)
gl_frame_fbo(gl, &tex_info);
#endif
gl_set_prev_texture(gl, &tex_info);
#ifdef FPS_COUNTER
bool fps_enable = g_extern.console.rmenu.state.msg_fps.enable;
if (fps_enable)
{
char fps_txt[128];
gfx_get_fps(fps_txt, sizeof(fps_txt), true);
if (gl->font_ctx)
gl->font_ctx->render_msg_place(gl, g_settings.video.msg_pos_x, 0.56f, 1.04f, WHITE, fps_txt);
}
#endif
if (msg && gl->font_ctx)
gl->font_ctx->render_msg(gl, msg);
#if !defined(RARCH_CONSOLE)
context_update_window_title_func(false);
#endif
RARCH_PERFORMANCE_STOP(frame_run);
#ifdef HAVE_RMENU
if (g_extern.draw_menu)
context_rmenu_frame_func(gl);
else
#endif
context_swap_buffers_func();
#if !defined(HAVE_OPENGLES) && defined(HAVE_FFMPEG)
if (gl->pbo_readback_enable)
gl_pbo_async_readback(gl);
#endif
return true;
}
#ifndef NO_GL_FF_VERTEX
static void gl_disable_client_arrays(void)
{
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}
#endif
static void gl_free(void *data)
{
#ifdef RARCH_CONSOLE
if (driver.video_data)
return;
#endif
gl_t *gl = (gl_t*)data;
if (gl->font_ctx)
gl->font_ctx->deinit(gl);
gl_shader_deinit(gl);
#ifndef NO_GL_FF_VERTEX
gl_disable_client_arrays();
#endif
glDeleteTextures(TEXTURES, gl->texture);
#if defined(HAVE_PSGL)
glBindBuffer(GL_TEXTURE_REFERENCE_BUFFER_SCE, 0);
glDeleteBuffers(1, &gl->pbo);
#endif
#if !defined(HAVE_OPENGLES) && defined(HAVE_FFMPEG)
if (gl->pbo_readback_enable)
{
pglDeleteBuffers(4, gl->pbo_readback);
scaler_ctx_gen_reset(&gl->pbo_readback_scaler);
}
#endif
#ifdef HAVE_FBO
gl_deinit_fbo(gl);
#endif
context_destroy_func();
free(gl->empty_buf);
free(gl->conv_buffer);
free(gl);
}
static void gl_set_nonblock_state(void *data, bool state)
{
gl_t *gl = (gl_t*)data;
RARCH_LOG("GL VSync => %s\n", state ? "off" : "on");
context_swap_interval_func(state ? 0 : 1);
}
static bool resolve_extensions(gl_t *gl)
{
#ifdef _WIN32
// Win32 GL lib doesn't have some elementary functions needed.
// Need to load dynamically :(
if (!load_gl_proc_win32(gl))
return false;
#endif
#ifdef NO_GL_CLAMP_TO_BORDER
// NOTE: This will be a serious problem for some shaders.
gl->border_type = GL_CLAMP_TO_EDGE;
#else
gl->border_type = GL_CLAMP_TO_BORDER;
#endif
#ifdef HAVE_OPENGLES2
if (!gl_query_extension("BGRA8888"))
{
RARCH_ERR("[GL]: GLES implementation does not have BGRA8888 extension.\n");
return false;
}
#endif
#if 0
// Useful for debugging, but kinda obnoxious.
const char *ext = (const char*)glGetString(GL_EXTENSIONS);
if (ext)
RARCH_LOG("[GL] Supported extensions: %s\n", ext);
#endif
return true;
}
static inline void gl_reinit_textures(gl_t *gl, const video_info_t *video)
{
unsigned old_base_size = gl->base_size;
unsigned old_width = gl->tex_w;
unsigned old_height = gl->tex_h;
gl->internal_fmt = video->rgb32 ? RARCH_GL_INTERNAL_FORMAT32 : RARCH_GL_INTERNAL_FORMAT16;
gl->texture_type = video->rgb32 ? RARCH_GL_TEXTURE_TYPE32 : RARCH_GL_TEXTURE_TYPE16;
gl->texture_fmt = video->rgb32 ? RARCH_GL_FORMAT32 : RARCH_GL_FORMAT16;
gl->base_size = video->rgb32 ? sizeof(uint32_t) : sizeof(uint16_t);
gl->tex_w = gl->tex_h = RARCH_SCALE_BASE * video->input_scale;
gl->empty_buf = realloc(gl->empty_buf, sizeof(uint32_t) * gl->tex_w * gl->tex_h);
if (gl->empty_buf)
memset(gl->empty_buf, 0, sizeof(uint32_t) * gl->tex_w * gl->tex_h);
if (old_base_size != gl->base_size || old_width != gl->tex_w || old_height != gl->tex_h)
{
RARCH_LOG("Reinitializing textures (%u x %u @ %u bpp)\n", gl->tex_w, gl->tex_h, gl->base_size * CHAR_BIT);
#if defined(HAVE_PSGL)
glBindBuffer(GL_TEXTURE_REFERENCE_BUFFER_SCE, 0);
glDeleteBuffers(1, &gl->pbo);
gl->pbo = 0;
#endif
glBindTexture(GL_TEXTURE_2D, 0);
glDeleteTextures(TEXTURES, gl->texture);
gl_init_textures(gl, video);
gl_init_textures_data(gl);
#ifdef HAVE_FBO
if (gl->tex_w > old_width || gl->tex_h > old_height)
{
RARCH_LOG("Reiniting FBO.\n");
gl_deinit_fbo(gl);
gl_init_fbo(gl, gl->tex_w, gl->tex_h);
}
#endif
}
else
RARCH_LOG("Reinitializing textures skipped.\n");
if (!gl_check_error())
RARCH_ERR("GL error reported while reinitializing textures. This should not happen ...\n");
}
static void gl_init_pbo_readback(gl_t *gl)
{
#if !defined(HAVE_OPENGLES) && defined(HAVE_FFMPEG)
// Only bother with this if we're doing FFmpeg GPU recording.
gl->pbo_readback_enable = g_settings.video.gpu_record && g_extern.recording;
if (!gl->pbo_readback_enable)
return;
RARCH_LOG("Async PBO readback enabled.\n");
pglGenBuffers(4, gl->pbo_readback);
for (unsigned i = 0; i < 4; i++)
{
pglBindBuffer(GL_PIXEL_PACK_BUFFER, gl->pbo_readback[i]);
pglBufferData(GL_PIXEL_PACK_BUFFER, gl->vp.width * gl->vp.height * sizeof(uint32_t),
NULL, GL_STREAM_READ);
}
pglBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
struct scaler_ctx *scaler = &gl->pbo_readback_scaler;
scaler->in_width = gl->vp.width;
scaler->in_height = gl->vp.height;
scaler->out_width = gl->vp.width;
scaler->out_height = gl->vp.height;
scaler->in_stride = gl->vp.width * sizeof(uint32_t);
scaler->out_stride = gl->vp.width * 3;
scaler->in_fmt = SCALER_FMT_ARGB8888;
scaler->out_fmt = SCALER_FMT_BGR24;
scaler->scaler_type = SCALER_TYPE_POINT;
if (!scaler_ctx_gen_filter(scaler))
{
gl->pbo_readback_enable = false;
RARCH_ERR("Failed to init pixel conversion for PBO.\n");
pglDeleteBuffers(4, gl->pbo_readback);
}
#else
(void)gl;
#endif
}
static void *gl_init(const video_info_t *video, const input_driver_t **input, void **input_data)
{
#ifdef _WIN32
gfx_set_dwm();
#endif
#ifdef RARCH_CONSOLE
if (driver.video_data)
{
gl_t *gl = (gl_t*)driver.video_data;
// Reinitialize textures as we might have changed pixel formats.
gl_reinit_textures(gl, video);
return driver.video_data;
}
#endif
gl_t *gl = (gl_t*)calloc(1, sizeof(gl_t));
if (!gl)
return NULL;
#ifdef HAVE_OPENGLES
gl->ctx_driver = gfx_ctx_init_first(GFX_CTX_OPENGL_ES_API);
#else
gl->ctx_driver = gfx_ctx_init_first(GFX_CTX_OPENGL_API);
#endif
if (!gl->ctx_driver)
{
free(gl);
return NULL;
}
RARCH_LOG("Found GL context: %s\n", gl->ctx_driver->ident);
context_get_video_size_func(&gl->full_x, &gl->full_y);
RARCH_LOG("Detecting screen resolution %ux%u.\n", gl->full_x, gl->full_y);
context_swap_interval_func(video->vsync ? 1 : 0);
unsigned win_width = video->width;
unsigned win_height = video->height;
if (video->fullscreen && (win_width == 0) && (win_height == 0))
{
win_width = gl->full_x;
win_height = gl->full_y;
}
if (!context_set_video_mode_func(win_width, win_height, video->fullscreen))
{
free(gl);
return NULL;
}
#ifndef RARCH_CONSOLE
context_update_window_title_func(true);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
#endif
if (!resolve_extensions(gl))
{
context_destroy_func();
free(gl);
return NULL;
}
gl->vsync = video->vsync;
gl->fullscreen = video->fullscreen;
// Get real known video size, which might have been altered by context.
context_get_video_size_func(&gl->win_width, &gl->win_height);
RARCH_LOG("GL: Using resolution %ux%u\n", gl->win_width, gl->win_height);
if (gl->full_x || gl->full_y) // We got bogus from gfx_ctx_get_video_size. Replace.
{
gl->full_x = gl->win_width;
gl->full_y = gl->win_height;
}
#if defined(HAVE_RMENU) && defined(HAVE_CG)
RARCH_LOG("Initializing menu shader ...\n");
gl_cg_set_menu_shader(default_paths.menu_shader_file);
#endif
#ifdef HAVE_GLSL
gl_glsl_set_get_proc_address(gl->ctx_driver->get_proc_address);
#endif
if (!gl_shader_init(gl))
{
RARCH_ERR("Shader init failed.\n");
context_destroy_func();
free(gl);
return NULL;
}
RARCH_LOG("GL: Loaded %u program(s).\n", gl_shader_num_func(gl));
gl->tex_w = RARCH_SCALE_BASE * video->input_scale;
gl->tex_h = RARCH_SCALE_BASE * video->input_scale;
#ifdef HAVE_FBO
// Set up render to texture.
gl_init_fbo(gl, gl->tex_w, gl->tex_h);
#endif
gl->keep_aspect = video->force_aspect;
// Apparently need to set viewport for passes when we aren't using FBOs.
gl_set_shader_viewport(gl, 0);
gl_set_shader_viewport(gl, 1);
bool force_smooth = false;
if (gl_shader_filter_type(gl, 1, &force_smooth))
gl->tex_filter = force_smooth ? GL_LINEAR : GL_NEAREST;
else
gl->tex_filter = video->smooth ? GL_LINEAR : GL_NEAREST;
gl->internal_fmt = video->rgb32 ? RARCH_GL_INTERNAL_FORMAT32 : RARCH_GL_INTERNAL_FORMAT16;
gl->texture_type = video->rgb32 ? RARCH_GL_TEXTURE_TYPE32 : RARCH_GL_TEXTURE_TYPE16;
gl->texture_fmt = video->rgb32 ? RARCH_GL_FORMAT32 : RARCH_GL_FORMAT16;
gl->base_size = video->rgb32 ? sizeof(uint32_t) : sizeof(uint16_t);
#ifndef HAVE_OPENGLES
glEnable(GL_TEXTURE_2D);
#endif
glDisable(GL_DEPTH_TEST);
glDisable(GL_DITHER);
memcpy(gl->tex_coords, tex_coords, sizeof(tex_coords));
gl->coords.vertex = vertex_ptr;
gl->coords.tex_coord = gl->tex_coords;
gl->coords.color = white_color;
gl->coords.lut_tex_coord = tex_coords;
gl_shader_set_coords_func(gl, &gl->coords, &gl->mvp);
// Empty buffer that we use to clear out the texture with on res change.
gl->empty_buf = calloc(sizeof(uint32_t), gl->tex_w * gl->tex_h);
#if !defined(HAVE_PSGL)
gl->conv_buffer = calloc(sizeof(uint32_t), gl->tex_w * gl->tex_h);
if (!gl->conv_buffer)
{
context_destroy_func();
free(gl);
return NULL;
}
#endif
gl_init_textures(gl, video);
gl_init_textures_data(gl);
context_input_driver_func(input, input_data);
#ifndef HAVE_RMENU
// Comes too early for console - moved to gl_start
gl->font_ctx = gl_font_init_first(gl, g_settings.video.font_path, g_settings.video.font_size);
#endif
gl_init_pbo_readback(gl);
if (!gl_check_error())
{
context_destroy_func();
free(gl);
return NULL;
}
return gl;
}
static bool gl_alive(void *data)
{
gl_t *gl = (gl_t*)data;
bool quit, resize;
context_check_window_func(&quit,
&resize, &gl->win_width, &gl->win_height,
g_extern.frame_count);
if (quit)
gl->quitting = true;
else if (resize)
gl->should_resize = true;
return !gl->quitting;
}
static bool gl_focus(void *data)
{
gl_t *gl = (gl_t*)data;
return context_has_focus_func();
}
#if defined(HAVE_XML) || defined(HAVE_CG)
static bool gl_set_shader(void *data, enum rarch_shader_type type, const char *path)
{
gl_t *gl = (gl_t*)data;
#ifdef HAVE_FBO
gl_deinit_fbo(gl);
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
#endif
gl_shader_deinit(gl);
switch (type)
{
#ifdef HAVE_XML
case RARCH_SHADER_BSNES:
if (!gl_glsl_init(path))
return false;
break;
#endif
#ifdef HAVE_CG
case RARCH_SHADER_CG:
if (!gl_cg_init(path))
return false;
break;
#endif
default:
RARCH_ERR("Invalid shader type in gl_set_shader().\n");
return false;
}
#ifdef HAVE_FBO
// Set up render to texture again.
gl_init_fbo(gl, gl->tex_w, gl->tex_h);
#endif
// Apparently need to set viewport for passes when we aren't using FBOs.
gl_set_shader_viewport(gl, 0);
gl_set_shader_viewport(gl, 1);
return true;
}
#endif
#ifndef NO_GL_READ_VIEWPORT
static void gl_viewport_info(void *data, struct rarch_viewport *vp)
{
gl_t *gl = (gl_t*)data;
*vp = gl->vp;
}
static bool gl_read_viewport(void *data, uint8_t *buffer)
{
gl_t *gl = (gl_t*)data;
RARCH_PERFORMANCE_INIT(read_viewport);
RARCH_PERFORMANCE_START(read_viewport);
#ifdef HAVE_OPENGLES
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(gl->vp.width * 3));
glReadPixels(gl->vp.x, gl->vp.y,
gl->vp.width, gl->vp.height,
GL_RGB, GL_UNSIGNED_BYTE, buffer);
uint8_t *pixels = (uint8_t*)buffer;
unsigned num_pixels = gl->vp.width * gl->vp.height;
// Convert RGB to BGR. Formats are byte ordered, so just swap 1st and 3rd byte.
for (unsigned i = 0; i <= num_pixels; pixels += 3, i++)
{
uint8_t tmp = pixels[2];
pixels[2] = pixels[0];
pixels[0] = tmp;
}
#else
#ifdef HAVE_FFMPEG
if (gl->pbo_readback_enable)
{
if (!gl->pbo_readback_valid) // We haven't buffered up enough frames yet, come back later.
return false;
pglBindBuffer(GL_PIXEL_PACK_BUFFER, gl->pbo_readback[gl->pbo_readback_index]);
const void *ptr = pglMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
if (!ptr)
{
RARCH_ERR("Failed to map pixel unpack buffer.\n");
return false;
}
scaler_ctx_scale(&gl->pbo_readback_scaler, buffer, ptr);
pglUnmapBuffer(GL_PIXEL_PACK_BUFFER);
pglBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
}
else // Use slow synchronous readbacks. Use this with plain screenshots as we don't really care about performance in this case.
#endif
{
glPixelStorei(GL_PACK_ROW_LENGTH, gl->vp.width);
glPixelStorei(GL_PACK_ALIGNMENT, get_alignment(gl->vp.width * 3));
glReadPixels(gl->vp.x, gl->vp.y,
gl->vp.width, gl->vp.height,
GL_BGR, GL_UNSIGNED_BYTE, buffer);
}
#endif
RARCH_PERFORMANCE_STOP(read_viewport);
return true;
}
#endif
#ifdef HAVE_RMENU
static void gl_start(void)
{
video_info_t video_info = {0};
// Might have to supply correct values here.
video_info.vsync = g_settings.video.vsync;
video_info.force_aspect = false;
video_info.smooth = g_settings.video.smooth;
video_info.input_scale = 2;
video_info.fullscreen = true;
if (g_settings.video.aspect_ratio_idx == ASPECT_RATIO_CUSTOM)
{
video_info.width = g_extern.console.screen.viewports.custom_vp.width;
video_info.height = g_extern.console.screen.viewports.custom_vp.height;
}
driver.video_data = gl_init(&video_info, NULL, NULL);
gl_t *gl = (gl_t*)driver.video_data;
#ifdef RARCH_CONSOLE
// Comes too early for console - moved to gl_start
gl->font_ctx = gl_font_init_first(gl, g_settings.video.font_path, g_settings.video.font_size);
#endif
context_get_available_resolutions_func();
#ifdef HAVE_RMENU
RARCH_LOG("Initializing menu shader...\n");
if (gl->ctx_driver->rmenu_init)
context_rmenu_init_func();
#endif
}
static void gl_stop(void)
{
void *data = driver.video_data;
driver.video_data = NULL;
gl_free(data);
}
static void gl_restart(void)
{
gl_t *gl = driver.video_data;
if (!gl)
return;
gl_stop();
#ifdef HAVE_CG
gl_cg_invalidate_context();
#endif
gl_start();
#ifdef HAVE_RMENU
SET_TIMER_EXPIRATION(0, 30);
#endif
g_extern.frame_count = 0;
}
static void gl_apply_state_changes(void)
{
gl_t *gl = (gl_t*)driver.video_data;
gl->should_resize = true;
}
static void gl_set_aspect_ratio(void *data, unsigned aspectratio_index)
{
(void)data;
gl_t *gl = driver.video_data;
if (g_settings.video.aspect_ratio_idx == ASPECT_RATIO_AUTO)
rarch_set_auto_viewport(g_extern.frame_cache.width, g_extern.frame_cache.height);
else if(g_settings.video.aspect_ratio_idx == ASPECT_RATIO_CORE)
rarch_set_core_viewport();
g_settings.video.aspect_ratio = aspectratio_lut[g_settings.video.aspect_ratio_idx].value;
g_settings.video.force_aspect = false;
gl->keep_aspect = true;
gl->should_resize = true;
}
#endif
const video_driver_t video_gl = {
gl_init,
gl_frame,
gl_set_nonblock_state,
gl_alive,
gl_focus,
#if defined(HAVE_XML) || defined(HAVE_CG)
gl_set_shader,
#else
NULL,
#endif
gl_free,
"gl",
#ifdef HAVE_RMENU
gl_start,
gl_stop,
gl_restart,
gl_apply_state_changes,
gl_set_aspect_ratio,
#endif
gl_set_rotation,
#ifndef NO_GL_READ_VIEWPORT
gl_viewport_info,
gl_read_viewport,
#else
NULL,
NULL,
#endif
};
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