static bool load_textures(void)
{
unsigned i;
if (!cg_shader->luts)
return true;
glGenTextures(cg_shader->luts, lut_textures);
for (i = 0; i < cg_shader->luts; i++)
{
RARCH_LOG("Loading image from: \"%s\".\n",
cg_shader->lut[i].path);
struct texture_image img = {0};
if (!texture_image_load(cg_shader->lut[i].path, &img))
{
RARCH_ERR("Failed to load picture ...\n");
return false;
}
load_texture_data(lut_textures[i], &img,
cg_shader->lut[i].filter != RARCH_FILTER_NEAREST,
gl_wrap_type_to_enum(cg_shader->lut[i].wrap));
texture_image_free(&img);
}
glBindTexture(GL_TEXTURE_2D, 0);
return true;
}
bool gl_load_luts(const struct gfx_shader *generic_shader, GLuint *lut_textures)
{
unsigned i, num_luts;
num_luts = min(generic_shader->luts, GFX_MAX_TEXTURES);
if (!generic_shader->luts)
return true;
// Original shader_glsl.c code only generated one texture handle. I assume
// it was a bug, but if not, replace num_luts with 1 when GLSL is used.
glGenTextures(num_luts, lut_textures);
for (i = 0; i < num_luts; i++)
{
struct texture_image img = {0};
RARCH_LOG("Loading texture image from: \"%s\" ...\n",
generic_shader->lut[i].path);
if (!texture_image_load(&img, generic_shader->lut[i].path))
{
RARCH_ERR("Failed to load texture image from: \"%s\"\n", generic_shader->lut[i].path);
return false;
}
gl_load_texture_data(lut_textures[i], &img,
gl_wrap_type_to_enum(generic_shader->lut[i].wrap),
generic_shader->lut[i].filter != RARCH_FILTER_NEAREST,
generic_shader->lut[i].mipmap);
texture_image_free(&img);
}
glBindTexture(GL_TEXTURE_2D, 0);
return true;
}
void gl_load_texture_data(GLuint id,
enum gfx_wrap_type wrap_type,
enum texture_filter_type filter_type,
unsigned alignment,
unsigned width, unsigned height,
const void *frame, unsigned base_size)
{
GLint mag_filter, min_filter;
GLenum wrap;
bool want_mipmap = false;
bool rgb32 = (base_size == (sizeof(uint32_t)));
glBindTexture(GL_TEXTURE_2D, id);
wrap = gl_wrap_type_to_enum(wrap_type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap);
switch (filter_type)
{
case TEXTURE_FILTER_MIPMAP_LINEAR:
min_filter = GL_LINEAR_MIPMAP_NEAREST;
mag_filter = GL_LINEAR;
#ifndef HAVE_PSGL
want_mipmap = true;
#endif
break;
case TEXTURE_FILTER_MIPMAP_NEAREST:
min_filter = GL_NEAREST_MIPMAP_NEAREST;
mag_filter = GL_NEAREST;
#ifndef HAVE_PSGL
want_mipmap = true;
#endif
break;
case TEXTURE_FILTER_NEAREST:
min_filter = GL_NEAREST;
mag_filter = GL_NEAREST;
break;
case TEXTURE_FILTER_LINEAR:
default:
min_filter = GL_LINEAR;
mag_filter = GL_LINEAR;
break;
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
#ifndef HAVE_PSGL
glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
#endif
glTexImage2D(GL_TEXTURE_2D,
0,
(driver.gfx_use_rgba || !rgb32) ? GL_RGBA : RARCH_GL_INTERNAL_FORMAT32,
width, height, 0,
(driver.gfx_use_rgba || !rgb32) ? GL_RGBA : RARCH_GL_TEXTURE_TYPE32,
(rgb32) ? RARCH_GL_FORMAT32 : GL_UNSIGNED_SHORT_4_4_4_4, frame);
if (want_mipmap)
glGenerateMipmap(GL_TEXTURE_2D);
}
static void gl_create_fbo_texture(gl_t *gl, unsigned i, GLuint texture)
{
unsigned mip_level;
bool fp_fbo;
GLenum min_filter, mag_filter, wrap_enum;
video_shader_ctx_filter_t filter_type;
video_shader_ctx_wrap_t wrap = {0};
bool mipmapped = false;
bool smooth = false;
settings_t *settings = config_get_ptr();
GLuint base_filt = settings->video.smooth ? GL_LINEAR : GL_NEAREST;
GLuint base_mip_filt = settings->video.smooth ?
GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST;
glBindTexture(GL_TEXTURE_2D, texture);
mip_level = i + 2;
mipmapped = video_shader_driver_mipmap_input(&mip_level);
min_filter = mipmapped ? base_mip_filt : base_filt;
filter_type.index = i + 2;
filter_type.smooth = &smooth;
if (video_shader_driver_filter_type(&filter_type))
{
min_filter = mipmapped ? (smooth ?
GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST)
: (smooth ? GL_LINEAR : GL_NEAREST);
}
mag_filter = min_filter_to_mag(min_filter);
wrap.idx = i + 2;
video_shader_driver_wrap_type(&wrap);
wrap_enum = gl_wrap_type_to_enum(wrap.type);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_enum);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_enum);
fp_fbo = gl->fbo_scale[i].fp_fbo;
if (fp_fbo)
{
if (!gl->has_fp_fbo)
RARCH_ERR("[GL]: Floating-point FBO was requested, but is not supported. Falling back to UNORM. Result may band/clip/etc.!\n");
}
#ifndef HAVE_OPENGLES2
if (fp_fbo && gl->has_fp_fbo)
{
RARCH_LOG("[GL]: 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_FLOAT, NULL);
}
else
#endif
{
#ifndef HAVE_OPENGLES
bool srgb_fbo = gl->fbo_scale[i].srgb_fbo;
if (!fp_fbo && srgb_fbo)
{
if (!gl->has_srgb_fbo)
RARCH_ERR("[GL]: sRGB FBO was requested, but it is not supported. Falling back to UNORM. Result may have banding!\n");
}
if (settings->video.force_srgb_disable)
srgb_fbo = false;
if (srgb_fbo && gl->has_srgb_fbo)
{
RARCH_LOG("[GL]: FBO pass #%d is sRGB.\n", i);
#ifdef HAVE_OPENGLES2
/* EXT defines are same as core GLES3 defines,
* but GLES3 variant requires different arguments. */
glTexImage2D(GL_TEXTURE_2D,
0, GL_SRGB_ALPHA_EXT,
gl->fbo_rect[i].width, gl->fbo_rect[i].height, 0,
gl->has_srgb_fbo_gles3 ? GL_RGBA : GL_SRGB_ALPHA_EXT,
GL_UNSIGNED_BYTE, NULL);
#else
glTexImage2D(GL_TEXTURE_2D,
0, GL_SRGB8_ALPHA8,
gl->fbo_rect[i].width, gl->fbo_rect[i].height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
#endif
}
else
#endif
{
#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
}
}
}
