diff options
Diffstat (limited to 'video/out/opengl/gl_common.c')
| -rw-r--r-- | video/out/opengl/gl_common.c | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/video/out/opengl/gl_common.c b/video/out/opengl/gl_common.c new file mode 100644 index 0000000000..2f78f11c08 --- /dev/null +++ b/video/out/opengl/gl_common.c @@ -0,0 +1,661 @@ +/* + * 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 mpv. + * + * mpv 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. + * + * mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>. + * + * 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" + +// 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; +} + +static void GLAPIENTRY dummy_glBindFramebuffer(GLenum target, GLuint framebuffer) +{ + assert(framebuffer == 0); +} + +static bool check_ext(GL *gl, const char *name) +{ + const char *exts = gl->extensions; + char *s = strstr(exts, name); + char *e = s ? s + strlen(name) : NULL; + return s && (s == exts || s[-1] == ' ') && (e[0] == ' ' || !e[0]); +} + +#define FN_OFFS(name) offsetof(GL, name) + +#define DEF_FN(name) {FN_OFFS(name), "gl" # name} +#define DEF_FN_NAME(name, str) {FN_OFFS(name), str} + +struct gl_function { + ptrdiff_t offset; + char *name; +}; + +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) + int ver_es_core; // introduced as required GL ES function + int ver_es_removed; // removed as required function (no replacement) + const struct gl_function *functions; +}; + +#define MAX_FN_COUNT 100 // max functions per gl_functions section + +// Note: to keep the number of sections low, some functions are in multiple +// sections (if there are tricky combinations of GL/ES versions) +static const struct gl_functions gl_functions[] = { + // GL 2.1+ desktop and GLES 2.0+ (anything we support) + // Probably all of these are in GL 2.0 too, but we require GLSL 120. + { + .ver_core = 210, + .ver_es_core = 200, + .functions = (const struct gl_function[]) { + DEF_FN(ActiveTexture), + DEF_FN(AttachShader), + DEF_FN(BindAttribLocation), + DEF_FN(BindBuffer), + DEF_FN(BindTexture), + DEF_FN(BlendFuncSeparate), + DEF_FN(BufferData), + DEF_FN(Clear), + DEF_FN(ClearColor), + DEF_FN(CompileShader), + DEF_FN(CreateProgram), + DEF_FN(CreateShader), + DEF_FN(DeleteBuffers), + DEF_FN(DeleteProgram), + DEF_FN(DeleteShader), + DEF_FN(DeleteTextures), + DEF_FN(Disable), + DEF_FN(DisableVertexAttribArray), + DEF_FN(DrawArrays), + DEF_FN(Enable), + DEF_FN(EnableVertexAttribArray), + DEF_FN(Finish), + DEF_FN(Flush), + DEF_FN(GenBuffers), + DEF_FN(GenTextures), + DEF_FN(GetAttribLocation), + DEF_FN(GetError), + DEF_FN(GetIntegerv), + DEF_FN(GetProgramInfoLog), + DEF_FN(GetProgramiv), + DEF_FN(GetShaderInfoLog), + DEF_FN(GetShaderiv), + DEF_FN(GetString), + DEF_FN(GetUniformLocation), + DEF_FN(LinkProgram), + DEF_FN(PixelStorei), + DEF_FN(ReadPixels), + DEF_FN(ShaderSource), + DEF_FN(TexImage2D), + DEF_FN(TexParameteri), + DEF_FN(TexSubImage2D), + DEF_FN(Uniform1f), + DEF_FN(Uniform2f), + DEF_FN(Uniform3f), + DEF_FN(Uniform1i), + DEF_FN(UniformMatrix2fv), + DEF_FN(UniformMatrix3fv), + DEF_FN(UseProgram), + DEF_FN(VertexAttribPointer), + DEF_FN(Viewport), + {0} + }, + }, + // GL 2.1+ desktop only (and GLSL 120 shaders) + { + .ver_core = 210, + .provides = MPGL_CAP_ROW_LENGTH | MPGL_CAP_1D_TEX | MPGL_CAP_3D_TEX, + .functions = (const struct gl_function[]) { + DEF_FN(DrawBuffer), + DEF_FN(GetTexLevelParameteriv), + DEF_FN(MapBuffer), + DEF_FN(ReadBuffer), + DEF_FN(TexImage1D), + DEF_FN(TexImage3D), + DEF_FN(UnmapBuffer), + {0} + }, + }, + // GL 3.0+ and ES 3.x core only functions. + { + .ver_core = 300, + .ver_es_core = 300, + .functions = (const struct gl_function[]) { + DEF_FN(GetStringi), + // for ES 3.0 + DEF_FN(GetTexLevelParameteriv), + DEF_FN(ReadBuffer), + DEF_FN(UnmapBuffer), + {0} + }, + }, + // Useful for ES 2.0 + { + .ver_core = 110, + .ver_es_core = 300, + .extension = "GL_EXT_unpack_subimage", + .provides = MPGL_CAP_ROW_LENGTH, + }, + // Framebuffers, extension in GL 2.x, core in GL 3.x core. + { + .ver_core = 300, + .ver_es_core = 200, + .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} + }, + }, + // VAOs, extension in GL 2.x, core in GL 3.x core. + { + .ver_core = 300, + .ver_es_core = 300, + .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} + } + }, + // Float textures, extension in GL 2.x, core in GL 3.x core. + { + .ver_core = 300, + .ver_es_core = 300, + .extension = "GL_ARB_texture_float", + .provides = MPGL_CAP_FLOAT_TEX, + }, + // GL_RED / GL_RG textures, extension in GL 2.x, core in GL 3.x core. + { + .ver_core = 300, + .ver_es_core = 300, + .extension = "GL_ARB_texture_rg", + .provides = MPGL_CAP_TEX_RG, + }, + // Swap control, always an OS specific extension + // The OSX code loads this manually. + { + .extension = "GLX_SGI_swap_control", + .functions = (const struct gl_function[]) { + DEF_FN_NAME(SwapInterval, "glXSwapIntervalSGI"), + {0}, + }, + }, + { + .extension = "WGL_EXT_swap_control", + .functions = (const struct gl_function[]) { + DEF_FN_NAME(SwapInterval, "wglSwapIntervalEXT"), + {0}, + }, + }, + { + .extension = "GLX_SGI_video_sync", + .functions = (const struct gl_function[]) { + DEF_FN_NAME(GetVideoSync, "glXGetVideoSyncSGI"), + DEF_FN_NAME(WaitVideoSync, "glXWaitVideoSyncSGI"), + {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, + }, + { + .ver_core = 430, + .extension = "GL_ARB_debug_output", + .provides = MPGL_CAP_DEBUG, + .functions = (const struct gl_function[]) { + // (only functions needed by us) + DEF_FN(DebugMessageCallback), + {0} + }, + }, + // These don't exist - they are for the sake of mpv internals, and libmpv + // interaction (see libmpv/opengl_cb.h). + { + .extension = "GL_MP_D3D_interfaces", + .functions = (const struct gl_function[]) { + DEF_FN(MPGetD3DInterface), + {0} + }, + }, +}; + +#undef FN_OFFS +#undef DEF_FN_HARD +#undef DEF_FN +#undef DEF_FN_NAME + + +// 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_functions2(GL *gl, void *(*get_fn)(void *ctx, const char *n), + void *fn_ctx, const char *ext2, struct mp_log *log) +{ + talloc_free_children(gl); + *gl = (GL) { + .extensions = talloc_strdup(gl, ext2 ? ext2 : ""), + }; + + gl->GetString = get_fn(fn_ctx, "glGetString"); + if (!gl->GetString) { + mp_err(log, "Can't load OpenGL functions.\n"); + goto error; + } + + int major = 0, minor = 0; + const char *version_string = gl->GetString(GL_VERSION); + if (!version_string) + goto error; + mp_verbose(log, "GL_VERSION='%s'\n", version_string); + if (strncmp(version_string, "OpenGL ES ", 10) == 0) { + version_string += 10; + gl->es = 100; + } + if (sscanf(version_string, "%d.%d", &major, &minor) < 2) + goto error; + gl->version = MPGL_VER(major, minor); + mp_verbose(log, "Detected %s %d.%d.\n", gl->es ? "GLES" : "desktop OpenGL", + major, minor); + + if (gl->es) { + gl->es = gl->version; + gl->version = 0; + if (gl->es < 200) { + mp_fatal(log, "At least GLESv2 required.\n"); + goto error; + } + } + + mp_verbose(log, "GL_VENDOR='%s'\n", gl->GetString(GL_VENDOR)); + mp_verbose(log, "GL_RENDERER='%s'\n", gl->GetString(GL_RENDERER)); + const char *shader = gl->GetString(GL_SHADING_LANGUAGE_VERSION); + if (shader) + mp_verbose(log, "GL_SHADING_LANGUAGE_VERSION='%s'\n", shader); + + if (gl->version >= 300) { + gl->GetStringi = get_fn(fn_ctx, "glGetStringi"); + gl->GetIntegerv = get_fn(fn_ctx, "glGetIntegerv"); + + if (!(gl->GetStringi && gl->GetIntegerv)) + goto error; + + 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); + } + + } else { + const char *ext = (char*)gl->GetString(GL_EXTENSIONS); + gl->extensions = talloc_asprintf_append(gl->extensions, " %s", ext); + } + + mp_dbg(log, "Combined OpenGL extensions string:\n%s\n", gl->extensions); + + for (int n = 0; n < MP_ARRAY_SIZE(gl_functions); n++) { + const struct gl_functions *section = &gl_functions[n]; + int version = gl->es ? gl->es : gl->version; + int ver_core = gl->es ? section->ver_es_core : section->ver_core; + int ver_removed = gl->es ? section->ver_es_removed : section->ver_removed; + + if (ver_removed && version >= 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, must_exist = false; + if (ver_core) + must_exist = version >= ver_core; + + if (section->extension && check_ext(gl, section->extension)) + exists = true; + + exists |= must_exist; + if (!exists) + continue; + + void *loaded[MAX_FN_COUNT] = {0}; + bool all_loaded = true; + const struct gl_function *fnlist = section->functions; + + for (int i = 0; fnlist && fnlist[i].name; i++) { + const struct gl_function *fn = &fnlist[i]; + void *ptr = get_fn(fn_ctx, fn->name); + if (!ptr) { + all_loaded = false; + mp_warn(log, "Required function '%s' not " + "found for %s OpenGL %d.%d.\n", fn->name, + section->extension ? section->extension : "builtin", + MPGL_VER_GET_MAJOR(ver_core), + MPGL_VER_GET_MINOR(ver_core)); + if (must_exist) + goto error; + break; + } + assert(i < MAX_FN_COUNT); + loaded[i] = ptr; + } + + if (all_loaded) { + gl->mpgl_caps |= section->provides; + for (int i = 0; fnlist && fnlist[i].name; i++) { + const struct gl_function *fn = &fnlist[i]; + void **funcptr = (void**)(((char*)gl) + fn->offset); + if (loaded[i]) + *funcptr = loaded[i]; + } + mp_verbose(log, "Loaded functions for %d/%s.\n", ver_core, + section->extension ? section->extension : "builtin"); + } + } + + gl->glsl_version = 0; + if (gl->es) { + if (gl->es >= 200) + gl->glsl_version = 100; + if (gl->es >= 300) + gl->glsl_version = 300; + } else { + if (gl->version >= 200) + gl->glsl_version = 110; + if (gl->version >= 210) + gl->glsl_version = 120; + if (gl->version >= 300) + 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 >= 320) + gl->glsl_version = 150; + } + + if (is_software_gl(gl)) { + gl->mpgl_caps |= MPGL_CAP_SW; + mp_verbose(log, "Detected suspected software renderer.\n"); + } + + // Provided for simpler handling if no framebuffer support is available. + if (!gl->BindFramebuffer) + gl->BindFramebuffer = &dummy_glBindFramebuffer; + return; + +error: + gl->version = 0; + gl->es = 0; + gl->mpgl_caps = 0; +} + +static void *get_procaddr_wrapper(void *ctx, const char *name) +{ + void *(*getProcAddress)(const GLubyte *) = ctx; + return getProcAddress ? getProcAddress((const GLubyte*)name) : NULL; +} + +void mpgl_load_functions(GL *gl, void *(*getProcAddress)(const GLubyte *), + const char *ext2, struct mp_log *log) +{ + mpgl_load_functions2(gl, get_procaddr_wrapper, getProcAddress, ext2, log); +} + +typedef void (*MPGLSetBackendFn)(MPGLContext *ctx); + +struct backend { + const char *name; + MPGLSetBackendFn init; + const struct mpgl_driver *driver; +}; + +extern const struct mpgl_driver mpgl_driver_x11; +extern const struct mpgl_driver mpgl_driver_x11egl; + +static const struct backend backends[] = { +#if HAVE_RPI + {"rpi", mpgl_set_backend_rpi}, +#endif +#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 + {.driver = &mpgl_driver_x11}, +#endif +#if HAVE_EGL_X11 + {.driver = &mpgl_driver_x11egl}, +#endif +}; + +int mpgl_find_backend(const char *name) +{ + if (name == NULL || strcmp(name, "auto") == 0) + return -1; + for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) { + const struct backend *entry = &backends[n]; + const char *ename = entry->driver ? entry->driver->name : entry->name; + if (strcmp(ename, 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 (int n = 0; n < MP_ARRAY_SIZE(backends); n++) { + const struct backend *entry = &backends[n]; + const char *ename = entry->driver ? entry->driver->name : entry->name; + mp_info(log, " %s\n", ename); + } + 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, const struct backend *backend, + bool probing, int vo_flags) +{ + MPGLContext *ctx = talloc_ptrtype(NULL, ctx); + *ctx = (MPGLContext) { + .gl = talloc_zero(ctx, GL), + .vo = vo, + .driver = backend->driver, + }; + bool old_probing = vo->probing; + vo->probing = probing; // hack; kill it once backends are separate + if (ctx->driver) { + MP_VERBOSE(vo, "Initializing OpenGL backend '%s'\n", ctx->driver->name); + ctx->priv = talloc_zero_size(ctx, ctx->driver->priv_size); + if (ctx->driver->init(ctx, vo_flags) < 0) { + talloc_free(ctx); + return NULL; + } + } else { + MP_VERBOSE(vo, "Initializing OpenGL backend '%s'\n", backend->name); + backend->init(ctx); + if (!ctx->vo_init(vo)) { + talloc_free(ctx); + return NULL; + } + } + vo->probing = old_probing; + + if (!ctx->driver && !ctx->config_window(ctx, vo_flags | VOFLAG_HIDDEN)) + goto cleanup; + + if (!ctx->gl->version && !ctx->gl->es) + goto cleanup; + + if (ctx->gl->es && vo->probing) { + MP_INFO(ctx->vo, "Skipping experimental GLES support (use --vo=opengl).\n"); + goto cleanup; + } + + if (ctx->gl->mpgl_caps & MPGL_CAP_SW) { + MP_WARN(ctx->vo, "Suspected software renderer or indirect context.\n"); + if (vo->probing) + goto cleanup; + } + + ctx->gl->debug_context = !!(vo_flags & VOFLAG_GL_DEBUG); + + return ctx; + +cleanup: + mpgl_uninit(ctx); + return NULL; +} + +// Create a VO window and create a GL context on it. +// vo_flags: passed to the backend's create window function +MPGLContext *mpgl_init(struct vo *vo, const char *backend_name, int vo_flags) +{ + MPGLContext *ctx = NULL; + int index = mpgl_find_backend(backend_name); + if (index == -1) { + for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) { + ctx = init_backend(vo, &backends[n], true, vo_flags); + if (ctx) + break; + } + } else if (index >= 0) { + ctx = init_backend(vo, &backends[index], false, vo_flags); + } + return ctx; +} + +// flags: passed to the backend function +bool mpgl_reconfig_window(struct MPGLContext *ctx, int vo_flags) +{ + if (ctx->driver) { + return ctx->driver->reconfig(ctx, vo_flags) >= 0; + } else { + return ctx->config_window(ctx, vo_flags); + } +} + +int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg) +{ + if (ctx->driver) { + return ctx->driver->control(ctx, events, request, arg); + } else { + return ctx->vo_control(ctx->vo, events, request, arg); + } +} + +void mpgl_swap_buffers(struct MPGLContext *ctx) +{ + if (ctx->driver) { + ctx->driver->swap_buffers(ctx); + } else { + ctx->swapGlBuffers(ctx); + } +} + +void mpgl_uninit(MPGLContext *ctx) +{ + if (ctx) { + if (ctx->driver) { + ctx->driver->uninit(ctx); + } else { + ctx->releaseGlContext(ctx); + ctx->vo_uninit(ctx->vo); + } + } + talloc_free(ctx); +} |