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57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#include <assert.h>
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#include "gl_state.h"
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OpenGLState glstate;
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GLExtensions gl_extensions;
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int OpenGLState::state_count = 0;
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void OpenGLState::Initialize() {
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if(initialized) return;
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Restore();
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initialized = true;
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}
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void OpenGLState::Restore() {
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int count = 0;
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blend.restore(); count++;
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blendEquation.restore(); count++;
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blendFunc.restore(); count++;
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blendColor.restore(); count++;
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scissorTest.restore(); count++;
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cullFace.restore(); count++;
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cullFaceMode.restore(); count++;
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frontFace.restore(); count++;
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depthTest.restore(); count++;
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depthRange.restore(); count++;
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depthFunc.restore(); count++;
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depthWrite.restore(); count++;
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colorMask.restore(); count++;
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viewport.restore(); count++;
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assert(count == state_count && "OpenGLState::Restore is missing some states");
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}
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void CheckGLExtensions() {
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static bool done = false;
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if (done)
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return;
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done = true;
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memset(&gl_extensions, 0, sizeof(gl_extensions));
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const char *extString = (const char *)glGetString(GL_EXTENSIONS);
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gl_extensions.OES_packed_depth_stencil = strstr(extString, "GL_OES_packed_depth_stencil") != 0;
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gl_extensions.OES_depth24 = strstr(extString, "GL_OES_depth24") != 0;
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gl_extensions.OES_depth_texture = strstr(extString, "GL_OES_depth_texture") != 0;
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gl_extensions.EXT_discard_framebuffer = strstr(extString, "GL_EXT_discard_framebuffer") != 0;
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}
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