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https://github.com/libretro/scummvm.git
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1e4696f6d0
Add a class to group all renderer related (static) functions. This allows to have getBestMatchingAvailableType inline in all engines. The matching code is now shared between all engines but allows customization for engines needing it (Grim, WME3D). The new code takes runtime availability of features to select the best renderer. It avoid crashes when user choosed OpenGL but GLES2 is used.
133 lines
3.6 KiB
C++
133 lines
3.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "graphics/renderer.h"
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#include "common/translation.h"
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#include "common/system.h"
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#include "graphics/opengl/context.h"
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namespace Graphics {
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static const RendererTypeDescription rendererTypes[] = {
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#if defined(USE_OPENGL_GAME)
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{ "opengl", _s("OpenGL"), kRendererTypeOpenGL },
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#endif
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#if defined(USE_OPENGL_SHADERS)
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{ "opengl_shaders", _s("OpenGL with shaders"), kRendererTypeOpenGLShaders },
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#endif
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#ifdef USE_TINYGL
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{ "software", "Software", kRendererTypeTinyGL },
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#endif
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{ 0, 0, kRendererTypeDefault }
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};
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DECLARE_TRANSLATION_ADDITIONAL_CONTEXT("OpenGL with shaders", "lowres")
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const RendererTypeDescription *Renderer::listTypes() {
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return rendererTypes;
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}
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RendererType Renderer::parseTypeCode(const Common::String &code) {
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const RendererTypeDescription *rt = listTypes();
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while (rt->code) {
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if (rt->code == code) {
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return rt->id;
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}
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rt++;
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}
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return kRendererTypeDefault;
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}
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Common::String Renderer::getTypeCode(RendererType type) {
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const RendererTypeDescription *rt = listTypes();
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while (rt->code) {
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if (rt->id == type) {
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return rt->code;
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}
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rt++;
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}
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return "";
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}
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uint32 Renderer::getAvailableTypes() {
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uint32 available = 0;
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#if defined(USE_TINYGL)
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/* TinyGL doesn't depend on hardware support */
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available |= kRendererTypeTinyGL;
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#endif
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#if defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
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bool backendCapableOpenGL = g_system->hasFeature(OSystem::kFeatureOpenGLForGame);
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if (backendCapableOpenGL) {
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/* Backend either support OpenGL or OpenGL ES(2) */
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#if defined(USE_OPENGL_GAME)
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/* OpenGL classic is compiled in, check if hardware supports it */
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if (g_system->getOpenGLType() == OpenGL::kOGLContextGL) {
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available |= kRendererTypeOpenGL;
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}
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#endif
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#if defined(USE_OPENGL_SHADERS)
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/* OpenGL with shaders is compiled in, check if hardware supports it */
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if (g_system->hasFeature(OSystem::kFeatureShadersForGame)) {
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available |= kRendererTypeOpenGLShaders;
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}
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#endif
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}
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#endif // defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS
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return available;
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}
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RendererType Renderer::getBestMatchingType(RendererType desired, uint32 available) {
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/* What we want is possible */
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if (available & desired) {
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return desired;
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}
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/* We apply the same logic when nothing is desired and when what we want is not possible */
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if (desired != kRendererTypeDefault) {
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warning("Unable to create a '%s' renderer", getTypeCode(desired).c_str());
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}
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/* Shaders are the best experience */
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if (available & kRendererTypeOpenGLShaders) {
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return kRendererTypeOpenGLShaders;
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}
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/* then OpenGL */
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if (available & kRendererTypeOpenGL) {
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return kRendererTypeOpenGL;
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}
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/* then TinyGL */
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if (available & kRendererTypeTinyGL) {
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return kRendererTypeTinyGL;
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}
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/* Failure is not an option */
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error("Unable to create a renderer");
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}
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} // End of namespace Graphics
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