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Diffstat (limited to 'src/gl/init.h')
-rw-r--r-- | src/gl/init.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/gl/init.h b/src/gl/init.h new file mode 100644 index 0000000..ad58ac6 --- /dev/null +++ b/src/gl/init.h @@ -0,0 +1,86 @@ +// Copyright 2021 Benjamin Barenblat +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. + +// OpenGL initialization. + +#ifndef GLPLANET_SRC_GL_INIT_H_ +#define GLPLANET_SRC_GL_INIT_H_ + +#include "src/gl/error.h" +#include "src/util.h" +#include "third_party/glew/include/GL/glew.h" + +namespace gl { + +// OpenGL capabilities +enum class Capability : GLenum { + kBlend = GL_BLEND, + kClipDistance0 = GL_CLIP_DISTANCE0, + kClipDistance1 = GL_CLIP_DISTANCE1, + kClipDistance2 = GL_CLIP_DISTANCE2, + kClipDistance3 = GL_CLIP_DISTANCE3, + kClipDistance4 = GL_CLIP_DISTANCE4, + kClipDistance5 = GL_CLIP_DISTANCE5, + kColorLogicOp = GL_COLOR_LOGIC_OP, + kCullFace = GL_CULL_FACE, + kDepthClamp = GL_DEPTH_CLAMP, + kDepthTest = GL_DEPTH_TEST, + kDither = GL_DITHER, + kFramebufferSrgb = GL_FRAMEBUFFER_SRGB, + kLineSmooth = GL_LINE_SMOOTH, + kMultisample = GL_MULTISAMPLE, + kPolygonOffsetFill = GL_POLYGON_OFFSET_FILL, + kPolygonOffsetLine = GL_POLYGON_OFFSET_LINE, + kPolygonOffsetPoint = GL_POLYGON_OFFSET_POINT, + kPolygonSmooth = GL_POLYGON_SMOOTH, + kRasterizerDiscard = GL_RASTERIZER_DISCARD, + kSampleAlphaToCoverage = GL_SAMPLE_ALPHA_TO_COVERAGE, + kSampleAlphaToOne = GL_SAMPLE_ALPHA_TO_ONE, + kSampleCoverage = GL_SAMPLE_COVERAGE, + kSampleShading = GL_SAMPLE_SHADING, + kSampleMask = GL_SAMPLE_MASK, + kScissorTest = GL_SCISSOR_TEST, + kStencilTest = GL_STENCIL_TEST, + kProgramPointSize = GL_PROGRAM_POINT_SIZE, + + // Added in GL 3.1 + kPrimitiveRestart = GL_PRIMITIVE_RESTART, + + // Added in GL 3.2 + kTextureCubeMapSeamless = GL_TEXTURE_CUBE_MAP_SEAMLESS, +}; + +// Initializes the OpenGL state machine in the current thread. The current +// thread must have an OpenGL context bound. +// +// You must call this function exactly once in your program. Once you do so, you +// may not call any other function in this namespace from any other thread. +void InitializeForThisThread(); + +// Enables the specified OpenGL capability. +inline void Enable(Capability cap) noexcept( + !(gl_internal::kThreadSafetyChecks || + gl_internal::kAggressiveErrorChecking)) { + gl_internal::CheckThreadSafety(); + glEnable(FromEnum(cap)); + gl_internal::UnnecessaryErrorCheck(); +} + +// Sets the clear color for the active framebuffer. Color coordinates should be +// in the range [0, 1]. +void SetClearColor(float red, float green, float blue, float alpha); + +} // namespace gl + +#endif // GLPLANET_SRC_GL_INIT_H_ |