mirror of https://github.com/mpv-player/mpv
345 lines
14 KiB
C
345 lines
14 KiB
C
#include "common/common.h"
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#include "formats.h"
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enum {
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// --- GL type aliases (for readability)
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T_U8 = GL_UNSIGNED_BYTE,
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T_U16 = GL_UNSIGNED_SHORT,
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T_FL = GL_FLOAT,
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};
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// List of allowed formats, and their usability for bilinear filtering and FBOs.
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// This is limited to combinations that are useful for our renderer.
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const struct gl_format gl_formats[] = {
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// These are used for desktop GL 3+, and GLES 3+ with GL_EXT_texture_norm16.
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{"r8", GL_R8, GL_RED, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{"rg8", GL_RG8, GL_RG, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{"rgb8", GL_RGB8, GL_RGB, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{"rgba8", GL_RGBA8, GL_RGBA, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{"r16", GL_R16, GL_RED, T_U16, F_CF | F_GL3 | F_GL2F | F_EXT16},
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{"rg16", GL_RG16, GL_RG, T_U16, F_CF | F_GL3 | F_GL2F | F_EXT16},
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{"rgb16", GL_RGB16, GL_RGB, T_U16, F_CF | F_GL3 | F_GL2F},
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{"rgba16", GL_RGBA16, GL_RGBA, T_U16, F_CF | F_GL3 | F_GL2F | F_EXT16},
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// Specifically not color-renderable.
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{"rgb16", GL_RGB16, GL_RGB, T_U16, F_TF | F_EXT16},
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// GL2 legacy. Ignores possibly present FBO extensions (no CF flag set).
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{"l8", GL_LUMINANCE8, GL_LUMINANCE, T_U8, F_TF | F_GL2},
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{"la8", GL_LUMINANCE8_ALPHA8, GL_LUMINANCE_ALPHA, T_U8, F_TF | F_GL2},
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{"rgb8", GL_RGB8, GL_RGB, T_U8, F_TF | F_GL2},
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{"rgba8", GL_RGBA8, GL_RGBA, T_U8, F_TF | F_GL2},
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{"l16", GL_LUMINANCE16, GL_LUMINANCE, T_U16, F_TF | F_GL2},
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{"la16", GL_LUMINANCE16_ALPHA16, GL_LUMINANCE_ALPHA, T_U16, F_TF | F_GL2},
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{"rgb16", GL_RGB16, GL_RGB, T_U16, F_TF | F_GL2},
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{"rgba16", GL_RGBA16, GL_RGBA, T_U16, F_TF | F_GL2},
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// ES2 legacy
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{"l" , GL_LUMINANCE,GL_LUMINANCE, T_U8, F_TF | F_ES2},
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{"la",GL_LUMINANCE_ALPHA,GL_LUMINANCE_ALPHA, T_U8, F_TF | F_ES2},
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{"rgb", GL_RGB, GL_RGB, T_U8, F_TF | F_ES2},
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{"rgba", GL_RGBA, GL_RGBA, T_U8, F_TF | F_ES2},
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// Non-normalized integer formats.
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// Follows ES 3.0 as to which are color-renderable.
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{"r8ui", GL_R8UI, GL_RED_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{"rg8ui", GL_RG8UI, GL_RG_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{"rgb8ui", GL_RGB8UI, GL_RGB_INTEGER, T_U8, F_GL3 | F_ES3},
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{"rgba8ui", GL_RGBA8UI, GL_RGBA_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{"r16ui", GL_R16UI, GL_RED_INTEGER, T_U16, F_CR | F_GL3 | F_ES3},
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{"rg16ui", GL_RG16UI, GL_RG_INTEGER, T_U16, F_CR | F_GL3 | F_ES3},
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{"rgb16ui", GL_RGB16UI, GL_RGB_INTEGER, T_U16, F_GL3 | F_ES3},
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{"rgba16ui",GL_RGBA16UI, GL_RGBA_INTEGER, T_U16, F_CR | F_GL3 | F_ES3},
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// On GL3+ or GL2.1 with GL_ARB_texture_float, floats work fully.
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{"r16f", GL_R16F, GL_RED, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{"rg16f", GL_RG16F, GL_RG, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{"rgb16f", GL_RGB16F, GL_RGB, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{"rgba16f", GL_RGBA16F, GL_RGBA, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{"r32f", GL_R32F, GL_RED, T_FL, F_CF | F_GL3 | F_GL2F},
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{"rg32f", GL_RG32F, GL_RG, T_FL, F_CF | F_GL3 | F_GL2F},
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{"rgb32f", GL_RGB32F, GL_RGB, T_FL, F_CF | F_GL3 | F_GL2F},
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{"rgba32f", GL_RGBA32F, GL_RGBA, T_FL, F_CF | F_GL3 | F_GL2F},
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// Note: we simply don't support float anything on ES2, despite extensions.
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// We also don't bother with non-filterable float formats, and we ignore
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// 32 bit float formats that are not blendable when rendering to them.
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// On ES3.2+, both 16 bit floats work fully (except 3-component formats).
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// F_EXTF16 implies extensions that also enable 16 bit floats fully.
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{"r16f", GL_R16F, GL_RED, T_FL, F_F16 | F_CF | F_ES32 | F_EXTF16},
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{"rg16f", GL_RG16F, GL_RG, T_FL, F_F16 | F_CF | F_ES32 | F_EXTF16},
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{"rgb16f", GL_RGB16F, GL_RGB, T_FL, F_F16 | F_TF | F_ES32 | F_EXTF16},
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{"rgba16f", GL_RGBA16F, GL_RGBA, T_FL, F_F16 | F_CF | F_ES32 | F_EXTF16},
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// On ES3.0+, 16 bit floats are texture-filterable.
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// Don't bother with 32 bit floats; they exist but are neither CR nor TF.
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{"r16f", GL_R16F, GL_RED, T_FL, F_F16 | F_TF | F_ES3},
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{"rg16f", GL_RG16F, GL_RG, T_FL, F_F16 | F_TF | F_ES3},
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{"rgb16f", GL_RGB16F, GL_RGB, T_FL, F_F16 | F_TF | F_ES3},
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{"rgba16f", GL_RGBA16F, GL_RGBA, T_FL, F_F16 | F_TF | F_ES3},
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// These might be useful as FBO formats.
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{"rgb10_a2",GL_RGB10_A2, GL_RGBA,
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GL_UNSIGNED_INT_2_10_10_10_REV, F_CF | F_GL3 | F_ES3},
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{"rgba12", GL_RGBA12, GL_RGBA, T_U16, F_CF | F_GL2 | F_GL3},
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{"rgb10", GL_RGB10, GL_RGB, T_U16, F_CF | F_GL2 | F_GL3},
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// Special formats.
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{"rgb565", GL_RGB8, GL_RGB,
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GL_UNSIGNED_SHORT_5_6_5, F_TF | F_GL2 | F_GL3},
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{"appleyp", GL_RGB, GL_RGB_422_APPLE,
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GL_UNSIGNED_SHORT_8_8_APPLE, F_TF | F_APPL},
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{0}
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};
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// Return an or-ed combination of all F_ flags that apply.
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int gl_format_feature_flags(GL *gl)
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{
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return (gl->version == 210 ? F_GL2 : 0)
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| (gl->version >= 300 ? F_GL3 : 0)
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| (gl->es == 200 ? F_ES2 : 0)
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| (gl->es >= 300 ? F_ES3 : 0)
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| (gl->es >= 320 ? F_ES32 : 0)
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| (gl->mpgl_caps & MPGL_CAP_EXT16 ? F_EXT16 : 0)
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| ((gl->es >= 300 &&
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(gl->mpgl_caps & MPGL_CAP_EXT_CR_HFLOAT)) ? F_EXTF16 : 0)
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| ((gl->version == 210 &&
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(gl->mpgl_caps & MPGL_CAP_ARB_FLOAT) &&
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(gl->mpgl_caps & MPGL_CAP_TEX_RG) &&
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(gl->mpgl_caps & MPGL_CAP_FB)) ? F_GL2F : 0)
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| (gl->mpgl_caps & MPGL_CAP_APPLE_RGB_422 ? F_APPL : 0);
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}
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// Return the entry for the given internal format. Return NULL if unsupported.
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const struct gl_format *gl_find_internal_format(GL *gl, GLint internal_format)
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{
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int features = gl_format_feature_flags(gl);
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for (int n = 0; gl_formats[n].type; n++) {
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const struct gl_format *f = &gl_formats[n];
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if (f->internal_format == internal_format && (f->flags & features))
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return f;
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}
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return NULL;
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}
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// Find the first supported format with a specific gl_format.type
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static const struct gl_format *gl_find_gl_type_format(GL *gl, GLenum type)
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{
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int features = gl_format_feature_flags(gl);
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for (int i = 0; gl_formats[i].type; i++) {
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const struct gl_format *f = &gl_formats[i];
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if (f->type == type && (f->flags & features))
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return f;
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}
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return NULL;
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}
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// type: one of MPGL_TYPE_*
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// flags: bitset of F_*, all flags must be present
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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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{
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if (!bytes_per_component || !n_components || !type)
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return NULL;
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int features = gl_format_feature_flags(gl);
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for (int n = 0; gl_formats[n].type; n++) {
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const struct gl_format *f = &gl_formats[n];
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if ((f->flags & features) &&
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((f->flags & flags) == flags) &&
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gl_format_type(f) == type &&
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gl_component_size(f->type) == bytes_per_component &&
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gl_format_components(f->format) == n_components)
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return f;
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}
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return NULL;
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}
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// Return a texture-filterable unsigned normalized fixed point format.
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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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{
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return gl_find_format(gl, MPGL_TYPE_UNORM, F_TF, bytes_per_component,
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n_components);
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}
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// Return an unsigned integer format.
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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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{
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return gl_find_format(gl, MPGL_TYPE_UINT, 0, bytes_per_component,
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n_components);
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}
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// Return a 16 bit float format. Note that this will return a GL_FLOAT format
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// with 32 bit per component; just the internal representation is smaller.
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// Some GL versions will allow upload with GL_HALF_FLOAT as well.
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const struct gl_format *gl_find_float16_format(GL *gl, int n_components)
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{
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return gl_find_format(gl, MPGL_TYPE_FLOAT, F_F16, 4, n_components);
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}
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int gl_format_type(const struct gl_format *format)
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{
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if (!format)
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return 0;
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if (format->type == GL_FLOAT)
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return MPGL_TYPE_FLOAT;
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if (gl_integer_format_to_base(format->format))
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return MPGL_TYPE_UINT;
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return MPGL_TYPE_UNORM;
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}
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// Return base internal format of an integer format, or 0 if it's not integer.
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// "format" is like in struct gl_format.
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GLenum gl_integer_format_to_base(GLenum format)
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{
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switch (format) {
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case GL_RED_INTEGER: return GL_RED;
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case GL_RG_INTEGER: return GL_RG;
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case GL_RGB_INTEGER: return GL_RGB;
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case GL_RGBA_INTEGER: return GL_RGBA;
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}
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return 0;
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}
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// Return whether it's a non-normalized integer format.
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// "format" is like in struct gl_format.
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bool gl_is_integer_format(GLenum format)
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{
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return !!gl_integer_format_to_base(format);
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}
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// Return the number of bytes per component this format implies.
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// Returns 0 for formats with non-byte alignments and formats which
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// merge multiple components (like GL_UNSIGNED_SHORT_5_6_5).
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// "type" is like in struct gl_format.
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int gl_component_size(GLenum type)
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{
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switch (type) {
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case GL_UNSIGNED_BYTE: return 1;
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case GL_UNSIGNED_SHORT: return 2;
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case GL_FLOAT: return 4;
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}
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return 0;
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}
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// Return the number of separate color components.
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// "format" is like in struct gl_format.
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int gl_format_components(GLenum format)
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{
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switch (format) {
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case GL_RED:
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case GL_RED_INTEGER:
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case GL_LUMINANCE:
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return 1;
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case GL_RG:
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case GL_RG_INTEGER:
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case GL_LUMINANCE_ALPHA:
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return 2;
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case GL_RGB:
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case GL_RGB_INTEGER:
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return 3;
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case GL_RGBA:
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case GL_RGBA_INTEGER:
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return 4;
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}
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return 0;
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}
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// Return the number of bytes per pixel for the given format.
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// Parameter names like in struct gl_format.
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int gl_bytes_per_pixel(GLenum format, GLenum type)
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{
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// Formats with merged components are special.
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switch (type) {
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case GL_UNSIGNED_INT_2_10_10_10_REV: return 4;
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case GL_UNSIGNED_SHORT_5_6_5: return 2;
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case GL_UNSIGNED_SHORT_8_8_APPLE: return 2;
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case GL_UNSIGNED_SHORT_8_8_REV_APPLE: return 2;
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}
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return gl_component_size(type) * gl_format_components(format);
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}
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// The format has cleanly separated components (on byte boundaries).
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bool gl_format_is_regular(const struct gl_format *fmt)
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{
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int bpp = gl_component_size(fmt->type) * gl_format_components(fmt->format);
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return bpp == gl_bytes_per_pixel(fmt->format, fmt->type);
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}
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// Like gl_find_unorm_format(), but takes bits (not bytes), and if no fixed
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// point format is available, return an unsigned integer format.
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static const struct gl_format *find_plane_format(GL *gl, int bytes, int n_channels)
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{
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const struct gl_format *f = gl_find_unorm_format(gl, bytes, n_channels);
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if (f)
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return f;
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return gl_find_uint_format(gl, bytes, n_channels);
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}
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// Put a mapping of imgfmt to OpenGL textures into *out. Basically it selects
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// the correct texture formats needed to represent an imgfmt in OpenGL, with
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// textures using the same memory organization as on the CPU.
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// Each plane is represented by a texture, and each texture has a RGBA
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// component order. out->components describes the meaning of them.
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// May return integer formats for >8 bit formats, if the driver has no
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// normalized 16 bit formats.
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// Returns false (and *out is not touched) if no format found.
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bool gl_get_imgfmt_desc(GL *gl, int imgfmt, struct gl_imgfmt_desc *out)
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{
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struct gl_imgfmt_desc res = {0};
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struct mp_regular_imgfmt regfmt;
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if (mp_get_regular_imgfmt(®fmt, imgfmt)) {
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res.num_planes = regfmt.num_planes;
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res.component_bits = regfmt.component_size * 8;
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res.component_pad = regfmt.component_pad;
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for (int n = 0; n < regfmt.num_planes; n++) {
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struct mp_regular_imgfmt_plane *plane = ®fmt.planes[n];
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res.planes[n] = find_plane_format(gl, regfmt.component_size,
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plane->num_components);
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if (!res.planes[n])
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return false;
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for (int i = 0; i < plane->num_components; i++)
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res.components[n][i] = plane->components[i];
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}
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res.chroma_w = regfmt.chroma_w;
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res.chroma_h = regfmt.chroma_h;
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goto supported;
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}
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// Special formats for which OpenGL happens to have direct support.
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if (imgfmt == IMGFMT_RGB565) {
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res.num_planes = 1;
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res.planes[0] = gl_find_gl_type_format(gl, GL_UNSIGNED_SHORT_5_6_5);
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if (!res.planes[0])
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return false;
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for (int n = 0; n < 3; n++)
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res.components[0][n] = n + 1;
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res.chroma_w = res.chroma_h = 1;
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goto supported;
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}
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if (imgfmt == IMGFMT_UYVY) {
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res.num_planes = 1;
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res.planes[0] = gl_find_gl_type_format(gl, GL_UNSIGNED_SHORT_8_8_APPLE);
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if (!res.planes[0])
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return false;
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res.components[0][0] = 3;
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res.components[0][1] = 1;
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res.components[0][2] = 2;
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res.chroma_w = res.chroma_h = 1;
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goto supported;
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}
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// Unsupported format
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return false;
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supported:
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*out = res;
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return true;
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}
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