cab432f843
Cubemaps are broken in ANGLE's D3D11 backend, except in WebGL mode for some reason. This is a terrible workaround, but it beats fucked up rendering in stage backgrounds.
92 lines
3 KiB
C
92 lines
3 KiB
C
/*
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* This software is licensed under the terms of the MIT License.
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* See COPYING for further information.
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* ---
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* Copyright (c) 2011-2019, Lukas Weber <laochailan@web.de>.
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* Copyright (c) 2012-2019, Andrei Alexeyev <akari@taisei-project.org>.
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*/
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#include "taisei.h"
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#include "gles.h"
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#include "../common/backend.h"
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#include "../gl33/gl33.h"
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#include "angle_egl.h"
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#ifdef _WIN32
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// Enable WebGL compatibility mode on Windows, because cubemaps are broken in the D3D11 backend
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// except in WebGL mode for some reason.
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#define ANGLE_WEBGL_DEFAULT true
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#else
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#define ANGLE_WEBGL_DEFAULT false
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#endif
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attr_unused
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static SDL_GLContext gles_create_context_webgl(SDL_Window *window) {
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int major, minor;
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SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &major);
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SDL_GL_GetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, &minor);
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return gles_create_context_angle(window, major, minor, true);
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}
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void gles_init(RendererBackend *gles_backend, int major, int minor) {
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GLVT_OF(*gles_backend).create_context = GLVT_OF(_r_backend_gl33).create_context;
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#ifdef TAISEI_BUILDCONF_HAVE_ANGLE
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// Load ANGLE by default by setting up some SDL-specific environment vars.
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// These are not overwritten if they are already set in the environment, so
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// you can still override this behavior as usual.
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#ifdef TAISEI_BUILDCONF_RELOCATABLE_INSTALL
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// In a relocatable build, paths are relative to SDL_GetBasePath
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char *basepath = SDL_GetBasePath();
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char buf[strlen(basepath) + sizeof(TAISEI_BUILDCONF_ANGLE_GLES_PATH) + sizeof(TAISEI_BUILDCONF_ANGLE_EGL_PATH)];
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snprintf(buf, sizeof(buf), "%s%s", basepath, TAISEI_BUILDCONF_ANGLE_GLES_PATH);
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env_set("SDL_VIDEO_GL_DRIVER", buf, false);
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snprintf(buf, sizeof(buf), "%s%s", basepath, TAISEI_BUILDCONF_ANGLE_EGL_PATH);
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env_set("SDL_VIDEO_EGL_DRIVER", buf, false);
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SDL_free(basepath);
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#else
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// Static absolute paths
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env_set("SDL_VIDEO_GL_DRIVER", TAISEI_BUILDCONF_ANGLE_GLES_PATH, false);
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env_set("SDL_VIDEO_EGL_DRIVER", TAISEI_BUILDCONF_ANGLE_EGL_PATH, false);
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#endif
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env_set("SDL_OPENGL_ES_DRIVER", 1, false);
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if(env_get("TAISEI_ANGLE_WEBGL", ANGLE_WEBGL_DEFAULT)) {
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GLVT_OF(*gles_backend).create_context = gles_create_context_webgl;
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}
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#endif // TAISEI_BUILDCONF_HAVE_ANGLE
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_r_backend_inherit(gles_backend, &_r_backend_gl33);
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glcommon_setup_attributes(SDL_GL_CONTEXT_PROFILE_ES, major, minor, 0);
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glcommon_load_library();
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}
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void gles_init_context(SDL_Window *w) {
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GLVT_OF(_r_backend_gl33).init_context(w);
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}
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bool gles_screenshot(Pixmap *out) {
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FloatRect vp;
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r_framebuffer_viewport_current(NULL, &vp);
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out->width = vp.w;
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out->height = vp.h;
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out->format = PIXMAP_FORMAT_RGBA8;
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out->origin = PIXMAP_ORIGIN_BOTTOMLEFT;
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out->data.untyped = pixmap_alloc_buffer_for_copy(out, &out->data_size);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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glReadPixels(vp.x, vp.y, vp.w, vp.h, GL_RGBA, GL_UNSIGNED_BYTE, out->data.untyped);
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return true;
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}
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bool gles_texture_dump(Texture *tex, uint mipmap, uint layer, Pixmap *dst) {
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// No glGetTexImage in GLES
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// TODO maybe set up a transient framebuffer to read from?
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log_warn("FIXME: not implemented");
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return false;
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}
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