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mpv/video/out/gl_common.c
wm4 920512d358 vo_opengl: move hwdec parts into their own files 
This wasn't done before because there was no advantage in "abstracting"
it. This changed, and putting this into its own files is better than
messing it into gl_common.c/h.
2014-12-03 23:01:19 +01:00

1038 lines
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/*
* common OpenGL routines
*
* copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
* Special thanks go to the xine team and Matthias Hopf, whose video_out_opengl.c
* gave me lots of good ideas.
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* You can alternatively redistribute this file and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
/**
* \file gl_common.c
* \brief OpenGL helper functions used by vo_gl.c and vo_gl2.c
*/
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#include <assert.h>
#include "talloc.h"
#include "gl_common.h"
#include "common/common.h"
#include "options/options.h"
#include "options/m_option.h"
//! \defgroup glgeneral OpenGL general helper functions
// GLU has this as gluErrorString (we don't use GLU, as it is legacy-OpenGL)
static const char *gl_error_to_string(GLenum error)
{
switch (error) {
case GL_INVALID_ENUM: return "INVALID_ENUM";
case GL_INVALID_VALUE: return "INVALID_VALUE";
case GL_INVALID_OPERATION: return "INVALID_OPERATION";
case GL_INVALID_FRAMEBUFFER_OPERATION:
return "INVALID_FRAMEBUFFER_OPERATION";
case GL_OUT_OF_MEMORY: return "OUT_OF_MEMORY";
default: return "unknown";
}
}
void glCheckError(GL *gl, struct mp_log *log, const char *info)
{
for (;;) {
GLenum error = gl->GetError();
if (error == GL_NO_ERROR)
break;
mp_msg(log, MSGL_ERR, "%s: OpenGL error %s.\n", info,
gl_error_to_string(error));
}
}
//! \defgroup glcontext OpenGL context management helper functions
//! \defgroup gltexture OpenGL texture handling helper functions
//! \defgroup glconversion OpenGL conversion helper functions
/**
* \brief adjusts the GL_UNPACK_ALIGNMENT to fit the stride.
* \param stride number of bytes per line for which alignment should fit.
* \ingroup glgeneral
*/
void glAdjustAlignment(GL *gl, int stride)
{
GLint gl_alignment;
if (stride % 8 == 0)
gl_alignment = 8;
else if (stride % 4 == 0)
gl_alignment = 4;
else if (stride % 2 == 0)
gl_alignment = 2;
else
gl_alignment = 1;
gl->PixelStorei(GL_UNPACK_ALIGNMENT, gl_alignment);
gl->PixelStorei(GL_PACK_ALIGNMENT, gl_alignment);
}
struct feature {
int id;
const char *name;
};
static const struct feature features[] = {
{MPGL_CAP_GL, "Basic OpenGL"},
{MPGL_CAP_GL_LEGACY, "Legacy OpenGL"},
{MPGL_CAP_GL2, "OpenGL 2.0"},
{MPGL_CAP_GL21, "OpenGL 2.1"},
{MPGL_CAP_GL3, "OpenGL 3.0"},
{MPGL_CAP_FB, "Framebuffers"},
{MPGL_CAP_VAO, "VAOs"},
{MPGL_CAP_SRGB_TEX, "sRGB textures"},
{MPGL_CAP_SRGB_FB, "sRGB framebuffers"},
{MPGL_CAP_FLOAT_TEX, "Float textures"},
{MPGL_CAP_TEX_RG, "RG textures"},
{MPGL_CAP_NO_SW, "NO_SW"},
{0},
};
static void list_features(int set, struct mp_log *log, int msgl, bool invert)
{
char b[1024] = {0};
for (const struct feature *f = &features[0]; f->id; f++) {
if (invert == !(f->id & set))
mp_snprintf_cat(b, sizeof(b), " [%s]", f->name);
}
mp_msg(log, msgl, "%s\n", b);
}
// This guesses if the current GL context is a suspected software renderer.
static bool is_software_gl(GL *gl)
{
const char *renderer = gl->GetString(GL_RENDERER);
const char *vendor = gl->GetString(GL_VENDOR);
return !(renderer && vendor) ||
strcmp(renderer, "Software Rasterizer") == 0 ||
strstr(renderer, "llvmpipe") ||
strcmp(vendor, "Microsoft Corporation") == 0 ||
strcmp(renderer, "Mesa X11") == 0;
}
#define FN_OFFS(name) offsetof(GL, name)
#define DEF_FN(name) {FN_OFFS(name), {"gl" # name}}
#define DEF_FN_NAMES(name, ...) {FN_OFFS(name), {__VA_ARGS__}}
struct gl_function {
ptrdiff_t offset;
char *funcnames[7];
};
struct gl_functions {
const char *extension; // introduced with this extension in any version
int provides; // bitfield of MPGL_CAP_* constants
int ver_core; // introduced as required function
int ver_removed; // removed as required function (no replacement)
bool partial_ok; // loading only some functions is ok
const struct gl_function *functions;
};
#define MAX_FN_COUNT 50 // max functions per gl_functions section
static const struct gl_functions gl_functions[] = {
// GL functions which are always available anywhere at least since 1.1
{
.ver_core = MPGL_VER(1, 1),
.provides = MPGL_CAP_GL,
.functions = (const struct gl_function[]) {
DEF_FN(Viewport),
DEF_FN(Clear),
DEF_FN(GenTextures),
DEF_FN(DeleteTextures),
DEF_FN(TexEnvi),
DEF_FN(ClearColor),
DEF_FN(Enable),
DEF_FN(Disable),
DEF_FN(DrawBuffer),
DEF_FN(DepthMask),
DEF_FN(BlendFunc),
DEF_FN(Flush),
DEF_FN(Finish),
DEF_FN(PixelStorei),
DEF_FN(TexImage1D),
DEF_FN(TexImage2D),
DEF_FN(TexSubImage2D),
DEF_FN(GetTexImage),
DEF_FN(TexParameteri),
DEF_FN(TexParameterf),
DEF_FN(TexParameterfv),
DEF_FN(GetIntegerv),
DEF_FN(GetBooleanv),
DEF_FN(ColorMask),
DEF_FN(ReadPixels),
DEF_FN(ReadBuffer),
DEF_FN(DrawArrays),
DEF_FN(GetString),
DEF_FN(GetError),
DEF_FN(GetTexLevelParameteriv),
{0}
},
},
// GL 2.0-3.x functions
{
.ver_core = MPGL_VER(2, 0),
.provides = MPGL_CAP_GL2,
.functions = (const struct gl_function[]) {
DEF_FN(GenBuffers),
DEF_FN(DeleteBuffers),
DEF_FN(BindBuffer),
DEF_FN(MapBuffer),
DEF_FN(UnmapBuffer),
DEF_FN(BufferData),
DEF_FN(ActiveTexture),
DEF_FN(BindTexture),
DEF_FN(GetAttribLocation),
DEF_FN(EnableVertexAttribArray),
DEF_FN(DisableVertexAttribArray),
DEF_FN(VertexAttribPointer),
DEF_FN(UseProgram),
DEF_FN(GetUniformLocation),
DEF_FN(CompileShader),
DEF_FN(CreateProgram),
DEF_FN(CreateShader),
DEF_FN(ShaderSource),
DEF_FN(LinkProgram),
DEF_FN(AttachShader),
DEF_FN(DeleteShader),
DEF_FN(DeleteProgram),
DEF_FN(GetShaderInfoLog),
DEF_FN(GetShaderiv),
DEF_FN(GetProgramInfoLog),
DEF_FN(GetProgramiv),
DEF_FN(BindAttribLocation),
DEF_FN(Uniform1f),
DEF_FN(Uniform2f),
DEF_FN(Uniform3f),
DEF_FN(Uniform1i),
DEF_FN(UniformMatrix2fv),
DEF_FN(UniformMatrix3fv),
DEF_FN(TexImage3D),
// Added in OpenGL 1.4, but vo_opengl_old doesn't need it
DEF_FN(BlendFuncSeparate),
{0},
},
},
// GL 2.1-3.x functions (also: GLSL 120 shaders)
{
.ver_core = MPGL_VER(2, 1),
.provides = MPGL_CAP_GL21,
.functions = (const struct gl_function[]) {
DEF_FN(UniformMatrix4x3fv),
{0}
},
},
// GL 3.x core only functions.
{
.ver_core = MPGL_VER(3, 0),
.provides = MPGL_CAP_GL3 | MPGL_CAP_SRGB_TEX | MPGL_CAP_SRGB_FB,
.functions = (const struct gl_function[]) {
DEF_FN(GetStringi),
{0}
},
},
// Framebuffers, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_ARB_framebuffer_object",
.provides = MPGL_CAP_FB,
.functions = (const struct gl_function[]) {
DEF_FN(BindFramebuffer),
DEF_FN(GenFramebuffers),
DEF_FN(DeleteFramebuffers),
DEF_FN(CheckFramebufferStatus),
DEF_FN(FramebufferTexture2D),
{0}
},
},
// Framebuffers, alternative extension name.
{
.ver_removed = MPGL_VER(3, 0), // don't touch these fn names in 3.x
.extension = "GL_EXT_framebuffer_object",
.provides = MPGL_CAP_FB,
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(BindFramebuffer, "glBindFramebufferEXT"),
DEF_FN_NAMES(GenFramebuffers, "glGenFramebuffersEXT"),
DEF_FN_NAMES(DeleteFramebuffers, "glDeleteFramebuffersEXT"),
DEF_FN_NAMES(CheckFramebufferStatus, "glCheckFramebufferStatusEXT"),
DEF_FN_NAMES(FramebufferTexture2D, "glFramebufferTexture2DEXT"),
{0}
},
},
// VAOs, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_ARB_vertex_array_object",
.provides = MPGL_CAP_VAO,
.functions = (const struct gl_function[]) {
DEF_FN(GenVertexArrays),
DEF_FN(BindVertexArray),
DEF_FN(DeleteVertexArrays),
{0}
}
},
// sRGB textures, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_EXT_texture_sRGB",
.provides = MPGL_CAP_SRGB_TEX,
.functions = (const struct gl_function[]) {{0}},
},
// sRGB framebuffers, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_EXT_framebuffer_sRGB",
.provides = MPGL_CAP_SRGB_FB,
.functions = (const struct gl_function[]) {{0}},
},
// Float textures, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_ARB_texture_float",
.provides = MPGL_CAP_FLOAT_TEX,
.functions = (const struct gl_function[]) {{0}},
},
// GL_RED / GL_RG textures, extension in GL 2.x, core in GL 3.x core.
{
.ver_core = MPGL_VER(3, 0),
.extension = "GL_ARB_texture_rg",
.provides = MPGL_CAP_TEX_RG,
.functions = (const struct gl_function[]) {{0}},
},
// Swap control, always an OS specific extension
{
.extension = "_swap_control",
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(SwapInterval, "glXSwapIntervalSGI", "glXSwapInterval",
"wglSwapIntervalSGI", "wglSwapInterval",
"wglSwapIntervalEXT"),
{0}
},
},
{
.extension = "GLX_SGI_video_sync",
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(GetVideoSync, "glXGetVideoSyncSGI"),
DEF_FN_NAMES(WaitVideoSync, "glXWaitVideoSyncSGI"),
{0},
},
},
// GL legacy functions in GL 1.x - 2.x, removed from GL 3.x
{
.ver_core = MPGL_VER(1, 1),
.ver_removed = MPGL_VER(3, 0),
.provides = MPGL_CAP_GL_LEGACY,
.functions = (const struct gl_function[]) {
DEF_FN(Begin),
DEF_FN(End),
DEF_FN(MatrixMode),
DEF_FN(LoadIdentity),
DEF_FN(Translated),
DEF_FN(Scaled),
DEF_FN(Ortho),
DEF_FN(PushMatrix),
DEF_FN(PopMatrix),
DEF_FN(GenLists),
DEF_FN(DeleteLists),
DEF_FN(NewList),
DEF_FN(EndList),
DEF_FN(CallList),
DEF_FN(CallLists),
DEF_FN(Color4ub),
DEF_FN(Color4f),
DEF_FN(TexCoord2f),
DEF_FN(TexCoord2fv),
DEF_FN(Vertex2f),
DEF_FN(VertexPointer),
DEF_FN(ColorPointer),
DEF_FN(TexCoordPointer),
DEF_FN(EnableClientState),
DEF_FN(DisableClientState),
{0}
},
},
// Loading of old extensions, which are later added to GL 2.0.
// NOTE: actually we should be checking the extension strings: the OpenGL
// library could provide an entry point, but not implement it.
// But the previous code didn't do that, and nobody ever complained.
{
.ver_removed = MPGL_VER(2, 1),
.partial_ok = true,
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(GenBuffers, "glGenBuffers", "glGenBuffersARB"),
DEF_FN_NAMES(DeleteBuffers, "glDeleteBuffers", "glDeleteBuffersARB"),
DEF_FN_NAMES(BindBuffer, "glBindBuffer", "glBindBufferARB"),
DEF_FN_NAMES(MapBuffer, "glMapBuffer", "glMapBufferARB"),
DEF_FN_NAMES(UnmapBuffer, "glUnmapBuffer", "glUnmapBufferARB"),
DEF_FN_NAMES(BufferData, "glBufferData", "glBufferDataARB"),
DEF_FN_NAMES(ActiveTexture, "glActiveTexture", "glActiveTextureARB"),
DEF_FN_NAMES(BindTexture, "glBindTexture", "glBindTextureARB", "glBindTextureEXT"),
DEF_FN_NAMES(MultiTexCoord2f, "glMultiTexCoord2f", "glMultiTexCoord2fARB"),
DEF_FN_NAMES(TexImage3D, "glTexImage3D"),
{0}
},
},
// Ancient ARB shaders.
{
.extension = "_program",
.ver_removed = MPGL_VER(3, 0),
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(GenPrograms, "glGenProgramsARB"),
DEF_FN_NAMES(DeletePrograms, "glDeleteProgramsARB"),
DEF_FN_NAMES(BindProgram, "glBindProgramARB"),
DEF_FN_NAMES(ProgramString, "glProgramStringARB"),
DEF_FN_NAMES(GetProgramivARB, "glGetProgramivARB"),
DEF_FN_NAMES(ProgramEnvParameter4f, "glProgramEnvParameter4fARB"),
{0}
},
},
// Ancient ATI extensions.
{
.extension = "ATI_fragment_shader",
.ver_removed = MPGL_VER(3, 0),
.functions = (const struct gl_function[]) {
DEF_FN_NAMES(BeginFragmentShader, "glBeginFragmentShaderATI"),
DEF_FN_NAMES(EndFragmentShader, "glEndFragmentShaderATI"),
DEF_FN_NAMES(SampleMap, "glSampleMapATI"),
DEF_FN_NAMES(ColorFragmentOp2, "glColorFragmentOp2ATI"),
DEF_FN_NAMES(ColorFragmentOp3, "glColorFragmentOp3ATI"),
DEF_FN_NAMES(SetFragmentShaderConstant, "glSetFragmentShaderConstantATI"),
{0}
},
},
// For gl_hwdec_vdpau.c
// http://www.opengl.org/registry/specs/NV/vdpau_interop.txt
{
.extension = "GL_NV_vdpau_interop",
.provides = MPGL_CAP_VDPAU,
.functions = (const struct gl_function[]) {
// (only functions needed by us)
DEF_FN(VDPAUInitNV),
DEF_FN(VDPAUFiniNV),
DEF_FN(VDPAURegisterOutputSurfaceNV),
DEF_FN(VDPAUUnregisterSurfaceNV),
DEF_FN(VDPAUSurfaceAccessNV),
DEF_FN(VDPAUMapSurfacesNV),
DEF_FN(VDPAUUnmapSurfacesNV),
{0}
},
},
// Apple Packed YUV Formats
// For gl_hwdec_vda.c
// http://www.opengl.org/registry/specs/APPLE/rgb_422.txt
{
.extension = "GL_APPLE_rgb_422",
.provides = MPGL_CAP_APPLE_RGB_422,
.functions = (const struct gl_function[]) {
{0}
},
},
};
#undef FN_OFFS
#undef DEF_FN_HARD
#undef DEF_FN
#undef DEF_FN_NAMES
// Fill the GL struct with function pointers and extensions from the current
// GL context. Called by the backend.
// getProcAddress: function to resolve function names, may be NULL
// ext2: an extra extension string
// log: used to output messages
// Note: if you create a CONTEXT_FORWARD_COMPATIBLE_BIT_ARB with OpenGL 3.0,
// you must append "GL_ARB_compatibility" to ext2.
void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *),
const char *ext2, struct mp_log *log)
{
talloc_free_children(gl);
*gl = (GL) {
.extensions = talloc_strdup(gl, ext2 ? ext2 : ""),
};
gl->GetString = getProcAddress ? getProcAddress("glGetString") : NULL;
if (!gl->GetString) {
mp_err(log, "Can't load OpenGL functions.\n");
return;
}
int major = 0, minor = 0;
const char *version = gl->GetString(GL_VERSION);
sscanf(version, "%d.%d", &major, &minor);
gl->version = MPGL_VER(major, minor);
mp_verbose(log, "Detected OpenGL %d.%d.\n", major, minor);
mp_verbose(log, "GL_VENDOR='%s'\n", gl->GetString(GL_VENDOR));
mp_verbose(log, "GL_RENDERER='%s'\n", gl->GetString(GL_RENDERER));
mp_verbose(log, "GL_VERSION='%s'\n", gl->GetString(GL_VERSION));
const char *shader = gl->GetString(GL_SHADING_LANGUAGE_VERSION);
if (shader)
mp_verbose(log, "GL_SHADING_LANGUAGE_VERSION='%s'\n", shader);
// Note: This code doesn't handle CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
// on OpenGL 3.0 correctly. Apparently there's no way to detect this
// situation, because GL_ARB_compatibility is specified only for 3.1
// and above.
bool has_legacy = false;
if (gl->version >= MPGL_VER(3, 0)) {
gl->GetStringi = getProcAddress("glGetStringi");
gl->GetIntegerv = getProcAddress("glGetIntegerv");
if (!(gl->GetStringi && gl->GetIntegerv))
return;
GLint exts;
gl->GetIntegerv(GL_NUM_EXTENSIONS, &exts);
for (int n = 0; n < exts; n++) {
const char *ext = gl->GetStringi(GL_EXTENSIONS, n);
gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
if (strcmp(ext, "GL_ARB_compatibility") == 0)
has_legacy = true;
}
// This version doesn't have GL_ARB_compatibility yet, and always
// includes legacy (except with CONTEXT_FORWARD_COMPATIBLE_BIT_ARB).
if (gl->version == MPGL_VER(3, 0))
has_legacy = true;
} else {
const char *ext = (char*)gl->GetString(GL_EXTENSIONS);
gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext);
has_legacy = true;
}
if (has_legacy)
mp_verbose(log, "OpenGL legacy compat. found.\n");
mp_dbg(log, "Combined OpenGL extensions string:\n%s\n", gl->extensions);
for (int n = 0; n < sizeof(gl_functions) / sizeof(gl_functions[0]); n++) {
const struct gl_functions *section = &gl_functions[n];
// With has_legacy, the legacy functions are still available, and
// functions are never actually removed. (E.g. the context could be at
// version >= 3.0, but functions like glBegin still exist and work.)
if (!has_legacy && section->ver_removed &&
gl->version >= section->ver_removed)
continue;
// NOTE: Function entrypoints can exist, even if they do not work.
// We must always check extension strings and versions.
bool exists = false;
if (section->ver_core)
exists = gl->version >= section->ver_core;
if (section->extension && strstr(gl->extensions, section->extension))
exists = true;
if (section->partial_ok)
exists = true; // possibly
if (!exists)
continue;
void *loaded[MAX_FN_COUNT] = {0};
bool all_loaded = true;
for (int i = 0; section->functions[i].funcnames[0]; i++) {
const struct gl_function *fn = &section->functions[i];
void *ptr = NULL;
for (int x = 0; fn->funcnames[x]; x++) {
ptr = getProcAddress((const GLubyte *)fn->funcnames[x]);
if (ptr)
break;
}
if (!ptr) {
all_loaded = false;
if (!section->partial_ok) {
mp_msg(log, MSGL_V, "Required function '%s' not "
"found for %s/%d.%d.\n", fn->funcnames[0],
section->extension ? section->extension : "native",
MPGL_VER_GET_MAJOR(section->ver_core),
MPGL_VER_GET_MINOR(section->ver_core));
break;
}
}
assert(i < MAX_FN_COUNT);
loaded[i] = ptr;
}
if (all_loaded || section->partial_ok) {
gl->mpgl_caps |= section->provides;
for (int i = 0; section->functions[i].funcnames[0]; i++) {
const struct gl_function *fn = &section->functions[i];
void **funcptr = (void**)(((char*)gl) + fn->offset);
if (loaded[i])
*funcptr = loaded[i];
}
}
}
gl->glsl_version = 0;
if (gl->version >= MPGL_VER(2, 0))
gl->glsl_version = 110;
if (gl->version >= MPGL_VER(2, 1))
gl->glsl_version = 120;
if (gl->version >= MPGL_VER(3, 0))
gl->glsl_version = 130;
// Specifically needed for OSX (normally we request 3.0 contexts only, but
// OSX always creates 3.2 contexts when requesting a core context).
if (gl->version >= MPGL_VER(3, 2))
gl->glsl_version = 150;
if (!is_software_gl(gl))
gl->mpgl_caps |= MPGL_CAP_NO_SW;
mp_verbose(log, "Detected OpenGL features:");
list_features(gl->mpgl_caps, log, MSGL_V, false);
}
/**
* \brief return the number of bytes per pixel for the given format
* \param format OpenGL format
* \param type OpenGL type
* \return bytes per pixel
* \ingroup glgeneral
*
* Does not handle all possible variants, just those used by MPlayer
*/
int glFmt2bpp(GLenum format, GLenum type)
{
int component_size = 0;
switch (type) {
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
return 1;
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
return 2;
case GL_UNSIGNED_BYTE:
component_size = 1;
break;
case GL_UNSIGNED_SHORT:
component_size = 2;
break;
}
switch (format) {
case GL_LUMINANCE:
case GL_ALPHA:
return component_size;
case GL_YCBCR_MESA:
case GL_RGB_422_APPLE:
return 2;
case GL_RGB:
case GL_BGR:
return 3 * component_size;
case GL_RGBA:
case GL_BGRA:
return 4 * component_size;
case GL_RED:
return component_size;
case GL_RG:
case GL_LUMINANCE_ALPHA:
return 2 * component_size;
}
abort(); // unknown
}
/**
* \brief upload a texture, handling things like stride and slices
* \param target texture target, usually GL_TEXTURE_2D
* \param format OpenGL format of data
* \param type OpenGL type of data
* \param dataptr data to upload
* \param stride data stride
* \param x x offset in texture
* \param y y offset in texture
* \param w width of the texture part to upload
* \param h height of the texture part to upload
* \param slice height of an upload slice, 0 for all at once
* \ingroup gltexture
*/
void glUploadTex(GL *gl, GLenum target, GLenum format, GLenum type,
const void *dataptr, int stride,
int x, int y, int w, int h, int slice)
{
const uint8_t *data = dataptr;
int y_max = y + h;
if (w <= 0 || h <= 0)
return;
if (slice <= 0)
slice = h;
if (stride < 0) {
data += (h - 1) * stride;
stride = -stride;
}
// this is not always correct, but should work for MPlayer
glAdjustAlignment(gl, stride);
gl->PixelStorei(GL_UNPACK_ROW_LENGTH, stride / glFmt2bpp(format, type));
for (; y + slice <= y_max; y += slice) {
gl->TexSubImage2D(target, 0, x, y, w, slice, format, type, data);
data += stride * slice;
}
if (y < y_max)
gl->TexSubImage2D(target, 0, x, y, w, y_max - y, format, type, data);
}
// Like glUploadTex, but upload a byte array with all elements set to val.
// If scratch is not NULL, points to a resizeable talloc memory block than can
// be freely used by the function (for avoiding temporary memory allocations).
void glClearTex(GL *gl, GLenum target, GLenum format, GLenum type,
int x, int y, int w, int h, uint8_t val, void **scratch)
{
int bpp = glFmt2bpp(format, type);
int stride = w * bpp;
int size = h * stride;
if (size < 1)
return;
void *data = scratch ? *scratch : NULL;
if (talloc_get_size(data) < size)
data = talloc_realloc(NULL, data, char *, size);
memset(data, val, size);
glAdjustAlignment(gl, stride);
gl->PixelStorei(GL_UNPACK_ROW_LENGTH, w);
gl->TexSubImage2D(target, 0, x, y, w, h, format, type, data);
if (scratch) {
*scratch = data;
} else {
talloc_free(data);
}
}
/**
* \brief download a texture, handling things like stride and slices
* \param target texture target, usually GL_TEXTURE_2D
* \param format OpenGL format of data
* \param type OpenGL type of data
* \param dataptr destination memory for download
* \param stride data stride (must be positive)
* \ingroup gltexture
*/
void glDownloadTex(GL *gl, GLenum target, GLenum format, GLenum type,
void *dataptr, int stride)
{
// this is not always correct, but should work for MPlayer
glAdjustAlignment(gl, stride);
gl->PixelStorei(GL_PACK_ROW_LENGTH, stride / glFmt2bpp(format, type));
gl->GetTexImage(target, 0, format, type, dataptr);
}
void glEnable3DLeft(GL *gl, int type)
{
GLint buffer;
switch (type) {
case GL_3D_RED_CYAN:
gl->ColorMask(GL_TRUE, GL_FALSE, GL_FALSE, GL_FALSE);
break;
case GL_3D_GREEN_MAGENTA:
gl->ColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
break;
case GL_3D_QUADBUFFER:
gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
switch (buffer) {
case GL_FRONT:
case GL_FRONT_LEFT:
case GL_FRONT_RIGHT:
buffer = GL_FRONT_LEFT;
break;
case GL_BACK:
case GL_BACK_LEFT:
case GL_BACK_RIGHT:
buffer = GL_BACK_LEFT;
break;
}
gl->DrawBuffer(buffer);
break;
}
}
void glEnable3DRight(GL *gl, int type)
{
GLint buffer;
switch (type) {
case GL_3D_RED_CYAN:
gl->ColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_FALSE);
break;
case GL_3D_GREEN_MAGENTA:
gl->ColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_FALSE);
break;
case GL_3D_QUADBUFFER:
gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
switch (buffer) {
case GL_FRONT:
case GL_FRONT_LEFT:
case GL_FRONT_RIGHT:
buffer = GL_FRONT_RIGHT;
break;
case GL_BACK:
case GL_BACK_LEFT:
case GL_BACK_RIGHT:
buffer = GL_BACK_RIGHT;
break;
}
gl->DrawBuffer(buffer);
break;
}
}
void glDisable3D(GL *gl, int type)
{
GLint buffer;
switch (type) {
case GL_3D_RED_CYAN:
case GL_3D_GREEN_MAGENTA:
gl->ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
break;
case GL_3D_QUADBUFFER:
gl->DrawBuffer(GL_BACK);
gl->GetIntegerv(GL_DRAW_BUFFER, &buffer);
switch (buffer) {
case GL_FRONT:
case GL_FRONT_LEFT:
case GL_FRONT_RIGHT:
buffer = GL_FRONT;
break;
case GL_BACK:
case GL_BACK_LEFT:
case GL_BACK_RIGHT:
buffer = GL_BACK;
break;
}
gl->DrawBuffer(buffer);
break;
}
}
mp_image_t *glGetWindowScreenshot(GL *gl)
{
GLint vp[4]; //x, y, w, h
gl->GetIntegerv(GL_VIEWPORT, vp);
mp_image_t *image = mp_image_alloc(IMGFMT_RGB24, vp[2], vp[3]);
if (!image)
return NULL;
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
gl->PixelStorei(GL_PACK_ALIGNMENT, 1);
gl->PixelStorei(GL_PACK_ROW_LENGTH, 0);
gl->ReadBuffer(GL_FRONT);
//flip image while reading (and also avoid stride-related trouble)
for (int y = 0; y < vp[3]; y++) {
gl->ReadPixels(vp[0], vp[1] + vp[3] - y - 1, vp[2], 1,
GL_RGB, GL_UNSIGNED_BYTE,
image->planes[0] + y * image->stride[0]);
}
return image;
}
typedef void (*MPGLSetBackendFn)(MPGLContext *ctx);
struct backend {
const char *name;
MPGLSetBackendFn init;
};
static const struct backend backends[] = {
#if HAVE_GL_COCOA
{"cocoa", mpgl_set_backend_cocoa},
#endif
#if HAVE_GL_WIN32
{"win", mpgl_set_backend_w32},
#endif
//Add the wayland backend before x11, in order to probe for a wayland-server before a x11-server and avoid using xwayland
#if HAVE_GL_WAYLAND
{"wayland", mpgl_set_backend_wayland},
#endif
#if HAVE_GL_X11
{"x11", mpgl_set_backend_x11},
#endif
#if HAVE_EGL_X11
{"x11egl", mpgl_set_backend_x11egl},
#endif
{0}
};
int mpgl_find_backend(const char *name)
{
if (name == NULL || strcmp(name, "auto") == 0)
return -1;
for (const struct backend *entry = backends; entry->name; entry++) {
if (strcmp(entry->name, name) == 0)
return entry - backends;
}
return -2;
}
int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
struct bstr name, struct bstr param)
{
if (bstr_equals0(param, "help")) {
mp_info(log, "OpenGL windowing backends:\n");
mp_info(log, " auto (autodetect)\n");
for (const struct backend *entry = backends; entry->name; entry++)
mp_info(log, " %s\n", entry->name);
return M_OPT_EXIT - 1;
}
char s[20];
snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
return mpgl_find_backend(s) >= -1 ? 1 : M_OPT_INVALID;
}
static MPGLContext *init_backend(struct vo *vo, MPGLSetBackendFn set_backend,
bool probing)
{
MPGLContext *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (MPGLContext) {
.gl = talloc_zero(ctx, GL),
.vo = vo,
};
vo->probing = probing;
set_backend(ctx);
if (!ctx->vo_init(vo)) {
talloc_free(ctx);
ctx = NULL;
}
vo->probing = false;
return ctx;
}
static MPGLContext *mpgl_create(struct vo *vo, const char *backend_name)
{
MPGLContext *ctx = NULL;
int index = mpgl_find_backend(backend_name);
if (index == -1) {
for (const struct backend *entry = backends; entry->name; entry++) {
ctx = init_backend(vo, entry->init, true);
if (ctx)
break;
}
} else if (index >= 0) {
ctx = init_backend(vo, backends[index].init, false);
}
return ctx;
}
MPGLContext *mpgl_init(struct vo *vo, const char *backend_name,
int gl_caps, int vo_flags)
{
MPGLContext *ctx = mpgl_create(vo, backend_name);
if (!ctx)
return NULL;
gl_caps |= MPGL_CAP_GL;
ctx->requested_gl_version = (gl_caps & MPGL_CAP_GL_LEGACY)
? MPGL_VER(2, 1) : MPGL_VER(3, 0);
if (ctx->config_window(ctx, vo_flags | VOFLAG_HIDDEN)) {
int missing = (ctx->gl->mpgl_caps & gl_caps) ^ gl_caps;
if (!missing)
return ctx;
MP_WARN(ctx->vo, "Missing OpenGL features:");
list_features(missing, ctx->vo->log, MSGL_WARN, false);
if (missing == MPGL_CAP_NO_SW) {
MP_WARN(ctx->vo, "Rejecting suspected software OpenGL renderer.\n");
} else if ((missing & MPGL_CAP_GL21) &&
(ctx->gl->mpgl_caps & MPGL_CAP_GL_LEGACY))
{
MP_WARN(ctx->vo, "OpenGL version too old. Try: --vo=opengl-old\n");
}
}
MP_ERR(ctx->vo, "OpenGL context creation failed!\n");
mpgl_uninit(ctx);
return NULL;
}
bool mpgl_reconfig_window(struct MPGLContext *ctx, int flags)
{
return ctx->config_window(ctx, flags);
}
void mpgl_uninit(MPGLContext *ctx)
{
if (ctx) {
ctx->releaseGlContext(ctx);
ctx->vo_uninit(ctx->vo);
}
talloc_free(ctx);
}
void mpgl_set_context(MPGLContext *ctx)
{
if (ctx->set_current)
ctx->set_current(ctx, true);
}
void mpgl_unset_context(MPGLContext *ctx)
{
if (ctx->set_current)
ctx->set_current(ctx, false);
}
void mpgl_lock(MPGLContext *ctx)
{
mpgl_set_context(ctx);
}
void mpgl_unlock(MPGLContext *ctx)
{
mpgl_unset_context(ctx);
}
bool mpgl_is_thread_safe(MPGLContext *ctx)
{
return !!ctx->set_current;
}
void mp_log_source(struct mp_log *log, int lev, const char *src)
{
int line = 1;
if (!src)
return;
while (*src) {
const char *end = strchr(src, '\n');
const char *next = end + 1;
if (!end)
next = end = src + strlen(src);
mp_msg(log, lev, "[%3d] %.*s\n", line, (int)(end - src), src);
line++;
src = next;
}
}
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