1 // 2 // Copyright 2017 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 // ClearMultiviewGL: 7 // A helper for clearing multiview side-by-side and layered framebuffers. 8 // 9 10 #ifndef LIBANGLE_RENDERER_GL_CLEARMULTIVIEWGL_H_ 11 #define LIBANGLE_RENDERER_GL_CLEARMULTIVIEWGL_H_ 12 13 #include "angle_gl.h" 14 #include "libANGLE/Error.h" 15 #include "libANGLE/angletypes.h" 16 17 namespace gl 18 { 19 class FramebufferState; 20 } // namespace gl 21 22 namespace rx 23 { 24 class FunctionsGL; 25 class StateManagerGL; 26 27 class ClearMultiviewGL : angle::NonCopyable 28 { 29 public: 30 // Enum containing the different types of Clear* commands. 31 enum class ClearCommandType 32 { 33 Clear, 34 ClearBufferfv, 35 ClearBufferuiv, 36 ClearBufferiv, 37 ClearBufferfi 38 }; 39 40 public: 41 ClearMultiviewGL(const FunctionsGL *functions, StateManagerGL *stateManager); 42 ~ClearMultiviewGL(); 43 44 ClearMultiviewGL(const ClearMultiviewGL &rht) = delete; 45 ClearMultiviewGL &operator=(const ClearMultiviewGL &rht) = delete; 46 ClearMultiviewGL(ClearMultiviewGL &&rht) = delete; 47 ClearMultiviewGL &operator=(ClearMultiviewGL &&rht) = delete; 48 49 void clearMultiviewFBO(const gl::FramebufferState &state, 50 const gl::Rectangle &scissorBase, 51 ClearCommandType clearCommandType, 52 GLbitfield mask, 53 GLenum buffer, 54 GLint drawbuffer, 55 const uint8_t *values, 56 GLfloat depth, 57 GLint stencil); 58 void initializeResources(); 59 60 private: 61 void attachTextures(const gl::FramebufferState &state, int layer); 62 void detachTextures(const gl::FramebufferState &state); 63 void clearLayeredFBO(const gl::FramebufferState &state, 64 ClearCommandType clearCommandType, 65 GLbitfield mask, 66 GLenum buffer, 67 GLint drawbuffer, 68 const uint8_t *values, 69 GLfloat depth, 70 GLint stencil); 71 void genericClear(ClearCommandType clearCommandType, 72 GLbitfield mask, 73 GLenum buffer, 74 GLint drawbuffer, 75 const uint8_t *values, 76 GLfloat depth, 77 GLint stencil); 78 79 const FunctionsGL *mFunctions; 80 StateManagerGL *mStateManager; 81 82 GLuint mFramebuffer; 83 }; 84 } // namespace rx 85 86 #endif // LIBANGLE_RENDERER_GL_CLEARMULTIVIEWGL_H_ 87