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05b3a8cd14
ES 2.0 has this weird rule that not the internalformat parameter determines the internal format, but the combination of all texture parameters. GL_OES_texture_half_float thus does not specify e.g. a GL_RGBA16F format, but requires passing GL_RGBA as format and GL_HALF_FLOAT_OES as type. We won't bother with this, since ES 2.0 is a lost cause anyway. This also removes the OpenGL error when the code is trying to create a f16 FBO for testing whether FBOs work.
275 lines
12 KiB
C
275 lines
12 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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{GL_R8, GL_RED, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{GL_RG8, GL_RG, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{GL_RGB8, GL_RGB, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{GL_RGBA8, GL_RGBA, T_U8, F_CF | F_GL3 | F_GL2F | F_ES3},
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{GL_R16, GL_RED, T_U16, F_CF | F_GL3 | F_GL2F | F_EXT16},
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{GL_RG16, GL_RG, T_U16, F_CF | F_GL3 | F_GL2F | F_EXT16},
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{GL_RGB16, GL_RGB, T_U16, F_CF | F_GL3 | F_GL2F},
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{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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{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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{GL_LUMINANCE8, GL_LUMINANCE, T_U8, F_TF | F_GL2},
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{GL_LUMINANCE8_ALPHA8, GL_LUMINANCE_ALPHA, T_U8, F_TF | F_GL2},
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{GL_RGB8, GL_RGB, T_U8, F_TF | F_GL2},
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{GL_RGBA8, GL_RGBA, T_U8, F_TF | F_GL2},
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{GL_LUMINANCE16, GL_LUMINANCE, T_U16, F_TF | F_GL2},
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{GL_LUMINANCE16_ALPHA16, GL_LUMINANCE_ALPHA, T_U16, F_TF | F_GL2},
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{GL_RGB16, GL_RGB, T_U16, F_TF | F_GL2},
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{GL_RGBA16, GL_RGBA, T_U16, F_TF | F_GL2},
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// ES2 legacy
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{GL_LUMINANCE, GL_LUMINANCE, T_U8, F_TF | F_ES2},
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{GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, T_U8, F_TF | F_ES2},
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{GL_RGB, GL_RGB, T_U8, F_TF | F_ES2},
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{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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{GL_R8UI, GL_RED_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{GL_RG8UI, GL_RG_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{GL_RGB8UI, GL_RGB_INTEGER, T_U8, F_GL3 | F_ES3},
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{GL_RGBA8UI, GL_RGBA_INTEGER, T_U8, F_CR | F_GL3 | F_ES3},
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{GL_R16UI, GL_RED_INTEGER, T_U16, F_CR | F_GL3 | F_ES3},
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{GL_RG16UI, GL_RG_INTEGER, T_U16, F_CR | F_GL3 | F_ES3},
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{GL_RGB16UI, GL_RGB_INTEGER, T_U16, F_GL3 | F_ES3},
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{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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{GL_R16F, GL_RED, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{GL_RG16F, GL_RG, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{GL_RGB16F, GL_RGB, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{GL_RGBA16F, GL_RGBA, T_FL, F_F16 | F_CF | F_GL3 | F_GL2F},
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{GL_R32F, GL_RED, T_FL, F_CF | F_GL3 | F_GL2F},
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{GL_RG32F, GL_RG, T_FL, F_CF | F_GL3 | F_GL2F},
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{GL_RGB32F, GL_RGB, T_FL, F_CF | F_GL3 | F_GL2F},
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{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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{GL_R16F, GL_RED, T_FL, F_F16 | F_CF | F_ES32 | F_EXTF16},
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{GL_RG16F, GL_RG, T_FL, F_F16 | F_CF | F_ES32 | F_EXTF16},
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{GL_RGB16F, GL_RGB, T_FL, F_F16 | F_TF | F_ES32 | F_EXTF16},
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{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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{GL_R16F, GL_RED, T_FL, F_F16 | F_TF | F_ES3},
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{GL_RG16F, GL_RG, T_FL, F_F16 | F_TF | F_ES3},
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{GL_RGB16F, GL_RGB, T_FL, F_F16 | F_TF | F_ES3},
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{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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{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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{GL_RGBA12, GL_RGBA, T_U16, F_CF | F_GL2 | F_GL3},
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{GL_RGB10, GL_RGB, T_U16, F_CF | F_GL2 | F_GL3},
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// Special formats.
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{GL_RGB8, GL_RGB,
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GL_UNSIGNED_SHORT_5_6_5, F_TF | F_GL2 | F_GL3},
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{GL_RGB_RAW_422_APPLE, GL_RGB_422_APPLE,
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GL_UNSIGNED_SHORT_8_8_APPLE, F_TF | F_APPL},
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{GL_RGB_RAW_422_APPLE, GL_RGB_422_APPLE,
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GL_UNSIGNED_SHORT_8_8_REV_APPLE, F_TF | F_APPL},
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{0}
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};
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// Pairs of mpv formats and OpenGL types that match directly. Code using this
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// is supposed to look through the gl_formats table, and there is supposed to
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// be exactly 1 matching entry (which tells you format/internal format).
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static const int special_formats[][2] = {
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{IMGFMT_RGB565, GL_UNSIGNED_SHORT_5_6_5},
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{IMGFMT_UYVY, GL_UNSIGNED_SHORT_8_8_APPLE},
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{IMGFMT_YUYV, GL_UNSIGNED_SHORT_8_8_REV_APPLE},
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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_TEX_RG) &&
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(gl->mpgl_caps & MPGL_CAP_EXT_CR_HFLOAT) &&
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(gl->mpgl_caps & MPGL_CAP_OES_HFLOAT_LIN)) ? 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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const struct gl_format *gl_find_special_format(GL *gl, int mpfmt)
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{
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int features = gl_format_feature_flags(gl);
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for (int n = 0; special_formats[n][0]; n++) {
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if (special_formats[n][0] == mpfmt) {
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GLenum type = special_formats[n][1];
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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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break;
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}
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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 an integer pixel "format" to a base internal format.
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// Return 0 if it's not an integer 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 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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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 a pixel "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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// does not handle all possible variants, just those used by mpv
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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_format_components(format) * gl_component_size(type);
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}
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