Add OpenGL ES support to Linux target and enable it for ARM devices
This commit is contained in:
Magnus Norddahl
parent
348b73eb83
commit
9c4b11b671
6 changed files with 211 additions and 85 deletions
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@ -130,8 +130,16 @@ void gl_LoadExtensions()
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InitContext();
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CollectExtensions();
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const char *version = Args->CheckValue("-glversion");
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const char *glversion = (const char*)glGetString(GL_VERSION);
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gl.es = false;
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if (glversion && strlen(glversion) > 10 && memcmp(glversion, "OpenGL ES ", 10) == 0)
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{
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glversion += 10;
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gl.es = true;
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}
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const char *version = Args->CheckValue("-glversion");
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if (version == NULL)
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{
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@ -147,90 +155,117 @@ void gl_LoadExtensions()
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float gl_version = (float)strtod(version, NULL) + 0.01f;
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// Don't even start if it's lower than 2.0 or no framebuffers are available (The framebuffer extension is needed for glGenerateMipmapsEXT!)
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if ((gl_version < 2.0f || !CheckExtension("GL_EXT_framebuffer_object")) && gl_version < 3.0f)
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if (gl.es)
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{
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I_FatalError("Unsupported OpenGL version.\nAt least OpenGL 2.0 with framebuffer support is required to run " GAMENAME ".\n");
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}
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if (gl_version < 2.0f)
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{
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I_FatalError("Unsupported OpenGL ES version.\nAt least OpenGL ES 2.0 is required to run " GAMENAME ".\n");
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}
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const char *glslversion = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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if (glslversion && strlen(glslversion) > 18 && memcmp(glslversion, "OpenGL ES GLSL ES ", 10) == 0)
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{
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glslversion += 18;
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}
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// add 0.01 to account for roundoff errors making the number a tad smaller than the actual version
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gl.glslversion = strtod(glslversion, NULL) + 0.01f;
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gl.vendorstring = (char*)glGetString(GL_VENDOR);
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// add 0.01 to account for roundoff errors making the number a tad smaller than the actual version
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gl.glslversion = strtod((char*)glGetString(GL_SHADING_LANGUAGE_VERSION), NULL) + 0.01f;
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gl.vendorstring = (char*)glGetString(GL_VENDOR);
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// first test for optional features
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if (CheckExtension("GL_ARB_texture_compression")) gl.flags |= RFL_TEXTURE_COMPRESSION;
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if (CheckExtension("GL_EXT_texture_compression_s3tc")) gl.flags |= RFL_TEXTURE_COMPRESSION_S3TC;
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if ((gl_version >= 3.3f || CheckExtension("GL_ARB_sampler_objects")) && !Args->CheckParm("-nosampler"))
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{
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gl.flags |= RFL_SAMPLER_OBJECTS;
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}
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// The minimum requirement for the modern render path are GL 3.0 + uniform buffers. Also exclude the Linux Mesa driver at GL 3.0 because it errors out on shader compilation.
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if (gl_version < 3.0f || (gl_version < 3.1f && (!CheckExtension("GL_ARB_uniform_buffer_object") || strstr(gl.vendorstring, "X.Org") != nullptr)))
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{
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gl.legacyMode = true;
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gl.lightmethod = LM_LEGACY;
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gl.buffermethod = BM_LEGACY;
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gl.glslversion = 0;
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gl.flags |= RFL_NO_CLIP_PLANES;
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}
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else
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{
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// Use the slowest/oldest modern path for now
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gl.legacyMode = false;
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gl.lightmethod = LM_DEFERRED;
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gl.buffermethod = BM_DEFERRED;
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if (gl_version < 4.f)
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}
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else
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{
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// Don't even start if it's lower than 2.0 or no framebuffers are available (The framebuffer extension is needed for glGenerateMipmapsEXT!)
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if ((gl_version < 2.0f || !CheckExtension("GL_EXT_framebuffer_object")) && gl_version < 3.0f)
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{
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#ifdef _WIN32
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if (strstr(gl.vendorstring, "ATI Tech"))
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{
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gl.flags |= RFL_NO_CLIP_PLANES; // gl_ClipDistance is horribly broken on ATI GL3 drivers for Windows.
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}
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#endif
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I_FatalError("Unsupported OpenGL version.\nAt least OpenGL 2.0 with framebuffer support is required to run " GAMENAME ".\n");
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}
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else if (gl_version < 4.5f)
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gl.es = false;
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// add 0.01 to account for roundoff errors making the number a tad smaller than the actual version
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gl.glslversion = strtod((char*)glGetString(GL_SHADING_LANGUAGE_VERSION), NULL) + 0.01f;
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gl.vendorstring = (char*)glGetString(GL_VENDOR);
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// first test for optional features
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if (CheckExtension("GL_ARB_texture_compression")) gl.flags |= RFL_TEXTURE_COMPRESSION;
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if (CheckExtension("GL_EXT_texture_compression_s3tc")) gl.flags |= RFL_TEXTURE_COMPRESSION_S3TC;
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if ((gl_version >= 3.3f || CheckExtension("GL_ARB_sampler_objects")) && !Args->CheckParm("-nosampler"))
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{
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// don't use GL 4.x features when running a GL 3.x context.
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if (CheckExtension("GL_ARB_buffer_storage"))
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{
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// work around a problem with older AMD drivers: Their implementation of shader storage buffer objects is piss-poor and does not match uniform buffers even closely.
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// Recent drivers, GL 4.4 don't have this problem, these can easily be recognized by also supporting the GL_ARB_buffer_storage extension.
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if (CheckExtension("GL_ARB_shader_storage_buffer_object"))
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{
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// Shader storage buffer objects are broken on current Intel drivers.
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if (strstr(gl.vendorstring, "Intel") == NULL)
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{
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gl.flags |= RFL_SHADER_STORAGE_BUFFER;
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}
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}
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gl.flags |= RFL_BUFFER_STORAGE;
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gl.lightmethod = LM_DIRECT;
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gl.buffermethod = BM_PERSISTENT;
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}
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gl.flags |= RFL_SAMPLER_OBJECTS;
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}
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// The minimum requirement for the modern render path are GL 3.0 + uniform buffers. Also exclude the Linux Mesa driver at GL 3.0 because it errors out on shader compilation.
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if (gl_version < 3.0f || (gl_version < 3.1f && (!CheckExtension("GL_ARB_uniform_buffer_object") || strstr(gl.vendorstring, "X.Org") != nullptr)))
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{
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gl.legacyMode = true;
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gl.lightmethod = LM_LEGACY;
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gl.buffermethod = BM_LEGACY;
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gl.glslversion = 0;
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gl.flags |= RFL_NO_CLIP_PLANES;
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}
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else
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{
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// Assume that everything works without problems on GL 4.5 drivers where these things are core features.
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gl.flags |= RFL_SHADER_STORAGE_BUFFER | RFL_BUFFER_STORAGE;
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gl.lightmethod = LM_DIRECT;
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gl.buffermethod = BM_PERSISTENT;
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}
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gl.legacyMode = false;
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gl.lightmethod = LM_DEFERRED;
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gl.buffermethod = BM_DEFERRED;
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if (gl_version < 4.f)
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{
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#ifdef _WIN32
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if (strstr(gl.vendorstring, "ATI Tech"))
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{
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gl.flags |= RFL_NO_CLIP_PLANES; // gl_ClipDistance is horribly broken on ATI GL3 drivers for Windows.
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}
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#endif
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}
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else if (gl_version < 4.5f)
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{
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// don't use GL 4.x features when running a GL 3.x context.
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if (CheckExtension("GL_ARB_buffer_storage"))
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{
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// work around a problem with older AMD drivers: Their implementation of shader storage buffer objects is piss-poor and does not match uniform buffers even closely.
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// Recent drivers, GL 4.4 don't have this problem, these can easily be recognized by also supporting the GL_ARB_buffer_storage extension.
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if (CheckExtension("GL_ARB_shader_storage_buffer_object"))
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{
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// Shader storage buffer objects are broken on current Intel drivers.
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if (strstr(gl.vendorstring, "Intel") == NULL)
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{
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gl.flags |= RFL_SHADER_STORAGE_BUFFER;
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}
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}
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gl.flags |= RFL_BUFFER_STORAGE;
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gl.lightmethod = LM_DIRECT;
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gl.buffermethod = BM_PERSISTENT;
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}
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}
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else
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{
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// Assume that everything works without problems on GL 4.5 drivers where these things are core features.
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gl.flags |= RFL_SHADER_STORAGE_BUFFER | RFL_BUFFER_STORAGE;
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gl.lightmethod = LM_DIRECT;
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gl.buffermethod = BM_PERSISTENT;
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}
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if (gl_version >= 4.3f || CheckExtension("GL_ARB_invalidate_subdata")) gl.flags |= RFL_INVALIDATE_BUFFER;
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if (gl_version >= 4.3f || CheckExtension("GL_KHR_debug")) gl.flags |= RFL_DEBUG;
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if (gl_version >= 4.3f || CheckExtension("GL_ARB_invalidate_subdata")) gl.flags |= RFL_INVALIDATE_BUFFER;
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if (gl_version >= 4.3f || CheckExtension("GL_KHR_debug")) gl.flags |= RFL_DEBUG;
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const char *lm = Args->CheckValue("-lightmethod");
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if (lm != NULL)
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{
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if (!stricmp(lm, "deferred") && gl.lightmethod == LM_DIRECT) gl.lightmethod = LM_DEFERRED;
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}
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const char *lm = Args->CheckValue("-lightmethod");
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if (lm != NULL)
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{
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if (!stricmp(lm, "deferred") && gl.lightmethod == LM_DIRECT) gl.lightmethod = LM_DEFERRED;
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}
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lm = Args->CheckValue("-buffermethod");
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if (lm != NULL)
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{
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if (!stricmp(lm, "deferred") && gl.buffermethod == BM_PERSISTENT) gl.buffermethod = BM_DEFERRED;
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lm = Args->CheckValue("-buffermethod");
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if (lm != NULL)
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{
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if (!stricmp(lm, "deferred") && gl.buffermethod == BM_PERSISTENT) gl.buffermethod = BM_DEFERRED;
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}
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}
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}
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