forked from libretro/RetroArch
/
gl.c
2583 lines (2152 loc) · 72.1 KB
/
gl.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
* Copyright (C) 2011-2013 - Daniel De Matteis
* Copyright (C) 2012-2013 - Michael Lelli
*
* 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 "image.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 ANDROID
#include "../frontend/frontend_android.h"
#endif
// Used for the last pass when rendering to the back buffer.
static 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 const GLfloat white_color[] = {
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
};
// Workaround broken Apple headers.
typedef const GLubyte* (*gl_get_stringi_proc)(GLenum name, GLuint index);
static inline bool gl_query_extension(gl_t *gl, const char *ext)
{
bool ret = false;
if (gl->core_context)
{
#ifdef GL_NUM_EXTENSIONS
GLint exts = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &exts);
for (GLint i = 0; i < exts; i++)
{
const char *str = (const char*)glGetStringi(GL_EXTENSIONS, i);
if (str && strstr(str, ext))
{
ret = true;
break;
}
}
#endif
}
else
{
const char *str = (const char*)glGetString(GL_EXTENSIONS);
ret = str && strstr(str, ext);
}
RARCH_LOG("Querying GL extension: %s => %s\n",
ext, ret ? "exists" : "doesn't exist");
return ret;
}
#ifdef HAVE_OVERLAY
static void gl_render_overlay(void *data);
static void gl_overlay_vertex_geom(void *data,
float x, float y, float w, float h);
static void gl_overlay_tex_geom(void *data,
float x, float y, float w, float h);
#endif
static inline void set_texture_coords(GLfloat *coords, GLfloat xamt, GLfloat yamt)
{
coords[2] = xamt;
coords[6] = xamt;
coords[5] = yamt;
coords[7] = yamt;
}
#if defined(HAVE_EGL) && defined(HAVE_OPENGLES2)
static bool check_eglimage_proc(void)
{
return glEGLImageTargetTexture2DOES != NULL;
}
#endif
#ifdef HAVE_GL_SYNC
static bool check_sync_proc(gl_t *gl)
{
if (!gl_query_extension(gl, "ARB_sync"))
return false;
return glFenceSync && glDeleteSync && glClientWaitSync;
}
#endif
#ifndef HAVE_OPENGLES
static bool init_vao(gl_t *gl)
{
if (!gl_query_extension(gl, "ARB_vertex_array_object"))
return false;
bool present = glGenVertexArrays && glBindVertexArray && glDeleteVertexArrays;
if (!present)
return false;
glGenVertexArrays(1, &gl->vao);
return true;
}
#endif
#ifdef HAVE_FBO
#if defined(HAVE_PSGL)
#define glGenFramebuffers glGenFramebuffersOES
#define glBindFramebuffer glBindFramebufferOES
#define glFramebufferTexture2D glFramebufferTexture2DOES
#define glCheckFramebufferStatus glCheckFramebufferStatusOES
#define glDeleteFramebuffers glDeleteFramebuffersOES
#define glGenRenderbuffers glGenRenderbuffersOES
#define glBindRenderbuffer glBindRenderbufferOES
#define glFramebufferRenderbuffer glFramebufferRenderbufferOES
#define glRenderbufferStorage glRenderbufferStorageOES
#define glDeleteRenderbuffers glDeleteRenderbuffersOES
#define GL_FRAMEBUFFER GL_FRAMEBUFFER_OES
#define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
#define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_OES
#define check_fbo_proc(gl) (true)
#elif !defined(HAVE_OPENGLES2)
static bool check_fbo_proc(gl_t *gl)
{
if (!gl_query_extension(gl, "ARB_framebuffer_object"))
return false;
return glGenFramebuffers && glBindFramebuffer && glFramebufferTexture2D &&
glCheckFramebufferStatus && glDeleteFramebuffers &&
glGenRenderbuffers && glBindRenderbuffer &&
glFramebufferRenderbuffer && glRenderbufferStorage &&
glDeleteRenderbuffers;
}
#else
#define check_fbo_proc(gl) (true)
#endif
#if defined(__APPLE__) || defined(HAVE_PSGL)
#define GL_RGBA32F GL_RGBA32F_ARB
#endif
#endif
////////////////// Shaders
static bool gl_shader_init(void *data)
{
gl_t *gl = (gl_t*)data;
const gl_shader_backend_t *backend = NULL;
const char *shader_path = (g_settings.video.shader_enable && *g_settings.video.shader_path) ?
g_settings.video.shader_path : NULL;
enum rarch_shader_type type = gfx_shader_parse_type(shader_path,
gl->core_context ? RARCH_SHADER_GLSL : DEFAULT_SHADER_TYPE);
if (type == RARCH_SHADER_NONE)
{
RARCH_LOG("[GL]: Not loading any shader.\n");
return true;
}
switch (type)
{
#ifdef HAVE_CG
case RARCH_SHADER_CG:
RARCH_LOG("[GL]: Using Cg shader backend.\n");
backend = &gl_cg_backend;
break;
#endif
#ifdef HAVE_GLSL
case RARCH_SHADER_GLSL:
RARCH_LOG("[GL]: Using GLSL shader backend.\n");
backend = &gl_glsl_backend;
break;
#endif
default:
break;
}
if (!backend)
{
RARCH_ERR("[GL]: Didn't find valid shader backend. Continuing without shaders.\n");
return true;
}
if (gl->core_context && RARCH_SHADER_CG)
{
RARCH_ERR("[GL]: Cg cannot be used with core GL context. Falling back to GLSL.\n");
backend = &gl_glsl_backend;
shader_path = NULL;
}
gl->shader = backend;
bool ret = gl->shader->init(shader_path);
if (!ret)
{
RARCH_ERR("[GL]: Failed to init shader, falling back to stock.\n");
ret = gl->shader->init(NULL);
}
return ret;
}
static inline void gl_shader_deinit(void *data)
{
gl_t *gl = (gl_t*)data;
if (gl->shader)
gl->shader->deinit();
gl->shader = NULL;
}
#ifndef NO_GL_FF_VERTEX
static void gl_set_coords(const struct gl_coords *coords)
{
glClientActiveTexture(GL_TEXTURE1);
glTexCoordPointer(2, GL_FLOAT, 0, coords->lut_tex_coord);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTexture(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);
}
static void gl_disable_client_arrays(gl_t *gl)
{
if (gl->core_context)
return;
glClientActiveTexture(GL_TEXTURE1);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTexture(GL_TEXTURE0);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
#endif
#ifndef NO_GL_FF_MATRIX
static void gl_set_mvp(const void *data)
{
const math_matrix *mat = (const math_matrix*)data;
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(mat->data);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
#endif
void gl_shader_set_coords(void *data, const struct gl_coords *coords, const math_matrix *mat)
{
gl_t *gl = (gl_t*)data;
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
}
#define gl_shader_num(gl) ((gl->shader) ? gl->shader->num_shaders() : 0)
#define gl_shader_filter_type(gl, index, smooth) ((gl->shader) ? gl->shader->filter_type(index, smooth) : false)
#ifdef IOS
// There is no default frame buffer on IOS.
void apple_bind_game_view_fbo(void);
#define gl_bind_backbuffer() apple_bind_game_view_fbo()
#else
#define gl_bind_backbuffer() glBindFramebuffer(GL_FRAMEBUFFER, 0)
#endif
#ifdef HAVE_FBO
static void gl_shader_scale(void *data, unsigned index, struct gfx_fbo_scale *scale)
{
gl_t *gl = (gl_t*)data;
scale->valid = false;
if (gl->shader)
gl->shader->shader_scale(index, scale);
}
static void gl_compute_fbo_geometry(void *data, unsigned width, unsigned height,
unsigned vp_width, unsigned vp_height)
{
gl_t *gl = (gl_t*)data;
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(void *data)
{
gl_t *gl = (gl_t*)data;
glGenTextures(gl->fbo_pass, gl->fbo_texture);
GLuint base_filt = g_settings.video.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);
bool fp_fbo = gl->fbo_scale[i].valid && gl->fbo_scale[i].fp_fbo;
if (fp_fbo)
{
// GLES and GL are inconsistent in which arguments to pass.
#ifdef HAVE_OPENGLES2
bool has_fp_fbo = gl_query_extension(gl, "OES_texture_float_linear");
if (!has_fp_fbo)
RARCH_ERR("OES_texture_float_linear extension not found.\n");
RARCH_LOG("FBO pass #%d is floating-point.\n", i);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
gl->fbo_rect[i].width, gl->fbo_rect[i].height,
0, GL_RGBA, GL_FLOAT, NULL);
#else
bool has_fp_fbo = gl_query_extension(gl, "ARB_texture_float");
if (!has_fp_fbo)
RARCH_ERR("ARB_texture_float extension was not found.\n");
RARCH_LOG("FBO pass #%d is floating-point.\n", i);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F,
gl->fbo_rect[i].width, gl->fbo_rect[i].height,
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
#endif
}
else
{
#ifdef HAVE_OPENGLES2
glTexImage2D(GL_TEXTURE_2D,
0, GL_RGBA,
gl->fbo_rect[i].width, gl->fbo_rect[i].height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
#else
// Avoid potential performance reductions on particular platforms.
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);
#endif
}
}
glBindTexture(GL_TEXTURE_2D, 0);
}
static bool gl_create_fbo_targets(void *data)
{
gl_t *gl = (gl_t*)data;
glBindTexture(GL_TEXTURE_2D, 0);
glGenFramebuffers(gl->fbo_pass, gl->fbo);
for (int i = 0; i < gl->fbo_pass; i++)
{
glBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->fbo_texture[i], 0);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
goto error;
}
return true;
error:
glDeleteFramebuffers(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(void *data)
{
gl_t *gl = (gl_t*)data;
if (gl->fbo_inited)
{
glDeleteTextures(gl->fbo_pass, gl->fbo_texture);
glDeleteFramebuffers(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(void *data, unsigned width, unsigned height)
{
gl_t *gl = (gl_t*)data;
if (gl_shader_num(gl) == 0)
return;
struct gfx_fbo_scale scale, scale_last;
gl_shader_scale(gl, 1, &scale);
gl_shader_scale(gl, gl_shader_num(gl), &scale_last);
/* we always want FBO to be at least initialized on startup for consoles */
if (gl_shader_num(gl) == 1 && !scale.valid)
return;
if (!check_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(gl) - 1;
if (scale_last.valid)
gl->fbo_pass++;
if (!scale.valid)
{
scale.scale_x = 1.0f;
scale.scale_y = 1.0f;
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;
}
#ifndef HAVE_RGL
static void gl_deinit_hw_render(gl_t *gl)
{
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;
}
static bool gl_init_hw_render(gl_t *gl, unsigned width, unsigned height)
{
RARCH_LOG("[GL]: Initializing HW render (%u x %u).\n", width, height);
GLint max_fbo_size = 0;
GLint max_renderbuffer_size = 0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_fbo_size);
glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &max_renderbuffer_size);
RARCH_LOG("[GL]: Max texture size: %d px, renderbuffer size: %u px.\n", max_fbo_size, max_renderbuffer_size);
if (!check_fbo_proc(gl))
return false;
glBindTexture(GL_TEXTURE_2D, 0);
glGenFramebuffers(gl->textures, gl->hw_render_fbo);
bool depth = g_extern.system.hw_render_callback.depth;
bool stencil = g_extern.system.hw_render_callback.stencil;
#ifdef HAVE_OPENGLES2
if (stencil && !gl_query_extension(gl, "OES_packed_depth_stencil"))
return false;
#endif
if (depth)
{
glGenRenderbuffers(gl->textures, gl->hw_render_depth);
gl->hw_render_depth_init = true;
}
for (unsigned i = 0; i < gl->textures; i++)
{
glBindFramebuffer(GL_FRAMEBUFFER, gl->hw_render_fbo[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->texture[i], 0);
if (depth)
{
if (stencil)
{
#ifdef HAVE_OPENGLES2
// GLES2 is a bit weird, as always. :P
glBindRenderbuffer(GL_RENDERBUFFER, gl->hw_render_depth[i]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES,
width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
// There's no GL_DEPTH_STENCIL_ATTACHMENT like in desktop GL.
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, gl->hw_render_depth[i]);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, gl->hw_render_depth[i]);
#else
// We use ARB FBO extensions, no need to check.
glBindRenderbuffer(GL_RENDERBUFFER, gl->hw_render_depth[i]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, gl->hw_render_depth[i]);
#endif
}
else
{
glBindRenderbuffer(GL_RENDERBUFFER, gl->hw_render_depth[i]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, gl->hw_render_depth[i]);
}
}
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != 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;
return true;
}
#endif
#endif
void gl_set_projection(void *data, struct gl_ortho *ortho, bool allow_rotate)
{
gl_t *gl = (gl_t*)data;
// Calculate projection.
matrix_ortho(&gl->mvp_no_rot, 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(&gl->mvp, &rot, &gl->mvp_no_rot);
}
else
gl->mvp = gl->mvp_no_rot;
}
void gl_set_viewport(void *data, unsigned width, unsigned height, bool force_full, bool allow_rotate)
{
gl_t *gl = (gl_t*)data;
int x = 0, y = 0;
struct gl_ortho ortho = {0, 1, 0, 1, -1, 1};
float device_aspect = 0.0f;
if (gl->ctx_driver->translate_aspect)
device_aspect = context_translate_aspect_func(width, height);
else
device_aspect = (float)width / height;
if (g_settings.video.scale_integer && !force_full)
{
gfx_scale_integer(&gl->vp, width, height, g_extern.system.aspect_ratio, gl->keep_aspect);
width = gl->vp.width;
height = gl->vp.height;
}
else if (gl->keep_aspect && !force_full)
{
float desired_aspect = g_extern.system.aspect_ratio;
float delta;
#if defined(HAVE_RGUI) || defined(HAVE_RMENU)
if (g_settings.video.aspect_ratio_idx == ASPECT_RATIO_CUSTOM)
{
const struct rarch_viewport *custom =
&g_extern.console.screen.viewports.custom_vp;
// GL has bottom-left origin viewport.
x = custom->x;
y = gl->win_height - custom->y - custom->height;
width = custom->width;
height = custom->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);
}
}
gl->vp.x = x;
gl->vp.y = y;
gl->vp.width = width;
gl->vp.height = height;
}
else
{
gl->vp.x = gl->vp.y = 0;
gl->vp.width = width;
gl->vp.height = height;
}
#if defined(RARCH_MOBILE)
// In portrait mode, we want viewport to gravitate to top of screen.
if (device_aspect < 1.0f)
gl->vp.y *= 2;
#endif
glViewport(gl->vp.x, gl->vp.y, gl->vp.width, gl->vp.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)
{
gl_t *gl = (gl_t*)data;
struct gl_ortho ortho = {0, 1, 0, 1, -1, 1};
gl->rotation = 90 * rotation;
gl_set_projection(gl, &ortho, true);
}
#ifdef HAVE_FBO
static inline void gl_start_frame_fbo(void *data)
{
gl_t *gl = (gl_t*)data;
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
glBindFramebuffer(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(void *data)
{
gl_t *gl = (gl_t*)data;
// 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;
glBindFramebuffer(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);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl->fbo_texture[i], 0);
GLenum status = glCheckFramebufferStatus(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(void *data, const struct gl_tex_info *tex_info)
{
gl_t *gl = (gl_t*)data;
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));
glBindFramebuffer(GL_FRAMEBUFFER, gl->fbo[i]);
if (gl->shader)
gl->shader->use(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);
if (gl->shader)
gl->shader->set_params(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(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.
gl_bind_backbuffer();
if (gl->shader)
gl->shader->use(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);
if (gl->shader)
gl->shader->set_params(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 = gl->vertex_ptr;
gl_shader_set_coords(gl, &gl->coords, &gl->mvp);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
gl->coords.tex_coord = gl->tex_coords;
}
#endif
static void gl_update_resize(void *data)
{
gl_t *gl = (gl_t*)data;
#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(void *data, unsigned width, unsigned height, unsigned pitch, bool clear)
{