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9c54b224d8
GL_LUMINANCE_ALPHA is the only reason why per-plane swizzles exist. Remove per-plane swizzles (again), and regrettably handle them as special cases (again). Carry along the logical texture format (called gl_format in some parts of the code, including the new one). We also don't need a use_integer flag, since the new gl_format member implies whether it's an integer texture. (Yes, the there are separate logical GL formats for integer textures. This aspect of the OpenGL API is hysteric at best.) This should change nothing about actual rendering logic and GL API usage.
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
#ifndef MPGL_FORMATS_H_
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#define MPGL_FORMATS_H_
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#include "common.h"
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struct gl_format {
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GLint internal_format; // glTexImage argument
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GLenum format; // glTexImage argument
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GLenum type; // e.g. GL_UNSIGNED_SHORT
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int flags;
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};
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extern const struct gl_format gl_formats[];
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enum {
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// --- gl_format.flags
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// Version flags. If at least 1 flag matches, the format entry is considered
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// supported on the current GL context.
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F_GL2 = 1 << 0, // GL2.1-only
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F_GL3 = 1 << 1, // GL3.0 or later
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F_ES2 = 1 << 2, // ES2-only
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F_ES3 = 1 << 3, // ES3.0 or later
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F_ES32 = 1 << 4, // ES3.2 or later
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F_EXT16 = 1 << 5, // ES with GL_EXT_texture_norm16
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F_EXTF16 = 1 << 6, // GL_EXT_color_buffer_half_float
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F_GL2F = 1 << 7, // GL2.1-only with texture_rg + texture_float + FBOs
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F_APPL = 1 << 8, // GL_APPLE_rgb_422
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// Feature flags. They are additional and signal presence of features.
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F_CR = 1 << 16, // color-renderable
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F_TF = 1 << 17, // texture-filterable with GL_LINEAR
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F_CF = F_CR | F_TF,
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F_F16 = 1 << 18, // uses half-floats (16 bit) internally, even though
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// the format is still GL_FLOAT (32 bit)
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// --- Other constants.
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MPGL_TYPE_UNORM = 1,
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MPGL_TYPE_UINT = 2,
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MPGL_TYPE_FLOAT = 3,
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};
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int gl_format_feature_flags(GL *gl);
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const struct gl_format *gl_find_internal_format(GL *gl, GLint internal_format);
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const struct gl_format *gl_find_special_format(GL *gl, int mpfmt);
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const struct gl_format *gl_find_format(GL *gl, int type, int flags,
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int bytes_per_component, int n_components);
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const struct gl_format *gl_find_unorm_format(GL *gl, int bytes_per_component,
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int n_components);
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const struct gl_format *gl_find_uint_format(GL *gl, int bytes_per_component,
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int n_components);
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const struct gl_format *gl_find_float16_format(GL *gl, int n_components);
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int gl_format_type(const struct gl_format *format);
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GLenum gl_integer_format_to_base(GLenum format);
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bool gl_is_integer_format(GLenum format);
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int gl_component_size(GLenum type);
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int gl_format_components(GLenum format);
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int gl_bytes_per_pixel(GLenum format, GLenum type);
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#endif
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