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mpv/video/out/opengl/formats.h

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vo_opengl: reorganize texture format handling This merges all knowledge about texture format into a central table. Most of the work done here is actually identifying which formats exactly are supported by OpenGL(ES) under which circumstances, and keeping this information in the format table in a somewhat declarative way. (Although only to the extend needed by mpv.) In particular, ES and float formats are a horrible mess. Again this is a big refactor that might cause regression on "obscure" configurations.
2016-05-12 18:08:49 +00:00
#ifndef MPGL_FORMATS_H_
#define MPGL_FORMATS_H_
#include "common.h"
struct gl_format {
GLint internal_format; // glTexImage argument
GLenum format; // glTexImage argument
GLenum type; // e.g. GL_UNSIGNED_SHORT
int flags;
};
extern const struct gl_format gl_formats[];
enum {
// --- gl_format.flags
// Version flags. If at least 1 flag matches, the format entry is considered
// supported on the current GL context.
F_GL2 = 1 << 0, // GL2.1-only
F_GL3 = 1 << 1, // GL3.0 or later
F_ES2 = 1 << 2, // ES2-only
F_ES3 = 1 << 3, // ES3.0 or later
F_ES32 = 1 << 4, // ES3.2 or later
F_EXT16 = 1 << 5, // ES with GL_EXT_texture_norm16
vo_opengl: make ES float texture format checks stricter Some of these checks became pointless after dropping ES 2.0 support for extended filtering. GL_EXT_texture_rg is part of core in ES 3.0, and we already check for this version, so testing for the extension is redundant. GL_OES_texture_half_float_linear is also always available, at least as far as our needs go. The functionality we need from GL_EXT_color_buffer_half_float is always available in ES 3.2, and we explicitly check for ES 3.2, so reject this extension if the ES version is new enough.
2016-05-23 17:29:08 +00:00
F_EXTF16 = 1 << 6, // GL_EXT_color_buffer_half_float
vo_opengl: reorganize texture format handling This merges all knowledge about texture format into a central table. Most of the work done here is actually identifying which formats exactly are supported by OpenGL(ES) under which circumstances, and keeping this information in the format table in a somewhat declarative way. (Although only to the extend needed by mpv.) In particular, ES and float formats are a horrible mess. Again this is a big refactor that might cause regression on "obscure" configurations.
2016-05-12 18:08:49 +00:00
F_GL2F = 1 << 7, // GL2.1-only with texture_rg + texture_float + FBOs
F_APPL = 1 << 8, // GL_APPLE_rgb_422
// Feature flags. They are additional and signal presence of features.
F_CR = 1 << 16, // color-renderable
F_TF = 1 << 17, // texture-filterable with GL_LINEAR
F_CF = F_CR | F_TF,
F_F16 = 1 << 18, // uses half-floats (16 bit) internally, even though
// the format is still GL_FLOAT (32 bit)
// --- Other constants.
MPGL_TYPE_UNORM = 1,
MPGL_TYPE_UINT = 2,
MPGL_TYPE_FLOAT = 3,
};
int gl_format_feature_flags(GL *gl);
const struct gl_format *gl_find_internal_format(GL *gl, GLint internal_format);
const struct gl_format *gl_find_special_format(GL *gl, int mpfmt);
const struct gl_format *gl_find_format(GL *gl, int type, int flags,
int bytes_per_component, int n_components);
const struct gl_format *gl_find_unorm_format(GL *gl, int bytes_per_component,
int n_components);
const struct gl_format *gl_find_uint_format(GL *gl, int bytes_per_component,
int n_components);
const struct gl_format *gl_find_float16_format(GL *gl, int n_components);
int gl_format_type(const struct gl_format *format);
GLenum gl_integer_format_to_base(GLenum format);
int gl_component_size(GLenum type);
int gl_format_components(GLenum format);
int gl_bytes_per_pixel(GLenum format, GLenum type);
#endif