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#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; // F_* flags
};
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
F_EXTF16 = 1 << 6, // GL_EXT_color_buffer_half_float
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, // normalized integer (fixed point) formats
MPGL_TYPE_UINT = 2, // full integer formats
MPGL_TYPE_FLOAT = 3, // float formats (both full and half)
};
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_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);
bool gl_format_is_regular(const struct gl_format *format);
GLenum gl_integer_format_to_base(GLenum format);
bool gl_is_integer_format(GLenum format);
int gl_component_size(GLenum type);
int gl_format_components(GLenum format);
int gl_bytes_per_pixel(GLenum format, GLenum type);
struct gl_imgfmt_desc {
int num_planes;
const struct gl_format *planes[4];
// Component storage size in bits (possibly padded). For formats with
// different sizes per component, this is arbitrary. For padded formats
// like P010 or YUV420P10, padding is included.
int component_bits;
// Like mp_regular_imgfmt.component_pad.
int component_pad;
// For each texture and each texture output (rgba order) describe what
// component it returns.
// The values are like the values in mp_regular_imgfmt_plane.components[].
// Access as components[plane_nr][component_index]. Set unused items to 0.
// This pretends GL_RG is used instead of GL_LUMINANCE_ALPHA. The renderer
// fixes this later.
uint8_t components[4][4];
};
bool gl_get_imgfmt_desc(GL *gl, int imgfmt, struct gl_imgfmt_desc *out);
#endif
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