1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/GLBlitHelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,116 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* vim: set ts=8 sts=4 et sw=4 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef GLBLITHELPER_H_
1.11 +#define GLBLITHELPER_H_
1.12 +
1.13 +#include "GLContextTypes.h"
1.14 +#include "GLConsts.h"
1.15 +#include "nsSize.h"
1.16 +#include "mozilla/Attributes.h"
1.17 +#include "mozilla/gfx/Point.h"
1.18 +
1.19 +namespace mozilla {
1.20 +namespace gl {
1.21 +
1.22 +class GLContext;
1.23 +
1.24 +/**
1.25 + * Helper function that creates a 2D texture aSize.width x aSize.height with
1.26 + * storage type specified by aFormats. Returns GL texture object id.
1.27 + *
1.28 + * See mozilla::gl::CreateTexture.
1.29 + */
1.30 +GLuint CreateTextureForOffscreen(GLContext* aGL, const GLFormats& aFormats,
1.31 + const gfx::IntSize& aSize);
1.32 +
1.33 +/**
1.34 + * Helper function that creates a 2D texture aSize.width x aSize.height with
1.35 + * storage type aInternalFormat. Returns GL texture object id.
1.36 + *
1.37 + * Initialize textyre parameters to:
1.38 + * GL_TEXTURE_MIN_FILTER = GL_LINEAR
1.39 + * GL_TEXTURE_MAG_FILTER = GL_LINEAR
1.40 + * GL_TEXTURE_WRAP_S = GL_CLAMP_TO_EDGE
1.41 + * GL_TEXTURE_WRAP_T = GL_CLAMP_TO_EDGE
1.42 + */
1.43 +GLuint CreateTexture(GLContext* aGL, GLenum aInternalFormat, GLenum aFormat,
1.44 + GLenum aType, const gfx::IntSize& aSize);
1.45 +
1.46 +/**
1.47 + * Helper function to create, potentially, multisample render buffers suitable
1.48 + * for offscreen rendering. Buffers of size aSize.width x aSize.height with
1.49 + * storage specified by aFormat. returns GL render buffer object id.
1.50 + */
1.51 +GLuint CreateRenderbuffer(GLContext* aGL, GLenum aFormat, GLsizei aSamples,
1.52 + const gfx::IntSize& aSize);
1.53 +
1.54 +/**
1.55 + * Helper function to create, potentially, multisample render buffers suitable
1.56 + * for offscreen rendering. Buffers of size aSize.width x aSize.height with
1.57 + * storage specified by aFormats. GL render buffer object ids are returned via
1.58 + * aColorMSRB, aDepthRB, and aStencilRB
1.59 + */
1.60 +void CreateRenderbuffersForOffscreen(GLContext* aGL, const GLFormats& aFormats,
1.61 + const gfx::IntSize& aSize, bool aMultisample,
1.62 + GLuint* aColorMSRB, GLuint* aDepthRB,
1.63 + GLuint* aStencilRB);
1.64 +
1.65 +
1.66 +/** Buffer blitting helper */
1.67 +class GLBlitHelper MOZ_FINAL
1.68 +{
1.69 + // The GLContext is the sole owner of the GLBlitHelper.
1.70 + GLContext* mGL;
1.71 +
1.72 + GLuint mTexBlit_Buffer;
1.73 + GLuint mTexBlit_VertShader;
1.74 + GLuint mTex2DBlit_FragShader;
1.75 + GLuint mTex2DRectBlit_FragShader;
1.76 + GLuint mTex2DBlit_Program;
1.77 + GLuint mTex2DRectBlit_Program;
1.78 +
1.79 + void UseBlitProgram();
1.80 + void SetBlitFramebufferForDestTexture(GLuint aTexture);
1.81 +
1.82 + bool UseTexQuadProgram(GLenum target, const gfx::IntSize& srcSize);
1.83 + bool InitTexQuadProgram(GLenum target = LOCAL_GL_TEXTURE_2D);
1.84 + void DeleteTexBlitProgram();
1.85 +
1.86 +public:
1.87 +
1.88 + GLBlitHelper(GLContext* gl);
1.89 + ~GLBlitHelper();
1.90 +
1.91 + // If you don't have |srcFormats| for the 2nd definition,
1.92 + // then you'll need the framebuffer_blit extensions to use
1.93 + // the first BlitFramebufferToFramebuffer.
1.94 + void BlitFramebufferToFramebuffer(GLuint srcFB, GLuint destFB,
1.95 + const gfx::IntSize& srcSize,
1.96 + const gfx::IntSize& destSize);
1.97 + void BlitFramebufferToFramebuffer(GLuint srcFB, GLuint destFB,
1.98 + const gfx::IntSize& srcSize,
1.99 + const gfx::IntSize& destSize,
1.100 + const GLFormats& srcFormats);
1.101 + void BlitTextureToFramebuffer(GLuint srcTex, GLuint destFB,
1.102 + const gfx::IntSize& srcSize,
1.103 + const gfx::IntSize& destSize,
1.104 + GLenum srcTarget = LOCAL_GL_TEXTURE_2D);
1.105 + void BlitFramebufferToTexture(GLuint srcFB, GLuint destTex,
1.106 + const gfx::IntSize& srcSize,
1.107 + const gfx::IntSize& destSize,
1.108 + GLenum destTarget = LOCAL_GL_TEXTURE_2D);
1.109 + void BlitTextureToTexture(GLuint srcTex, GLuint destTex,
1.110 + const gfx::IntSize& srcSize,
1.111 + const gfx::IntSize& destSize,
1.112 + GLenum srcTarget = LOCAL_GL_TEXTURE_2D,
1.113 + GLenum destTarget = LOCAL_GL_TEXTURE_2D);
1.114 +};
1.115 +
1.116 +}
1.117 +}
1.118 +
1.119 +#endif // GLBLITHELPER_H_
