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-/*
- * Copyright 2009, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-
-// This file contains the GAPIGL class, implementing the GAPI interface for
-// GL.
-
-#ifndef GPU_COMMAND_BUFFER_SERVICE_GAPI_GL_H_
-#define GPU_COMMAND_BUFFER_SERVICE_GAPI_GL_H_
-
-#include <build/build_config.h>
-#include <GL/glew.h>
-#include <Cg/cg.h>
-#include <Cg/cgGL.h>
-#include "gpu/command_buffer/common/gapi_interface.h"
-#include "gpu/command_buffer/service/gl_utils.h"
-#include "gpu/command_buffer/service/effect_gl.h"
-#include "gpu/command_buffer/service/geometry_gl.h"
-#include "gpu/command_buffer/service/render_surface_gl.h"
-#include "gpu/command_buffer/service/sampler_gl.h"
-#include "gpu/command_buffer/service/texture_gl.h"
-
-namespace command_buffer {
-namespace o3d {
-#if defined(OS_LINUX)
-class XWindowWrapper;
-#endif // defined(OS_LINUX)
-
-// This class implements the GAPI interface for GL.
-class GAPIGL : public GAPIInterface {
- public:
- GAPIGL();
- virtual ~GAPIGL();
-
-#if defined(OS_LINUX)
- void set_window_wrapper(XWindowWrapper *window) { window_ = window; }
-#elif defined(OS_WIN)
- void set_hwnd(HWND hwnd) { hwnd_ = hwnd; }
-
- HWND hwnd() const {
- return hwnd_;
- }
-#endif
-
- // Initializes the graphics context, bound to a window.
- // Returns:
- // true if successful.
- virtual bool Initialize();
-
- // Initailizes Cg.
- void InitCG();
-
- // Helper function for Initailize that inits just glew.
- bool InitGlew();
-
- // Destroys the graphics context.
- virtual void Destroy();
-
- // Implements the BeginFrame function for GL.
- virtual void BeginFrame();
-
- // Implements the EndFrame function for GL.
- virtual void EndFrame();
-
- // Implements the Clear function for GL.
- virtual void Clear(unsigned int buffers,
- const RGBA &color,
- float depth,
- unsigned int stencil);
-
- // Implements the SetViewport function for GL.
- virtual void SetViewport(unsigned int x,
- unsigned int y,
- unsigned int width,
- unsigned int height,
- float z_min,
- float z_max);
-
- // Implements the CreateVertexBuffer function for GL.
- virtual ParseError CreateVertexBuffer(ResourceId id,
- unsigned int size,
- unsigned int flags);
-
- // Implements the DestroyVertexBuffer function for GL.
- virtual ParseError DestroyVertexBuffer(ResourceId id);
-
- // Implements the SetVertexBufferData function for GL.
- virtual ParseError SetVertexBufferData(ResourceId id,
- unsigned int offset,
- unsigned int size,
- const void *data);
-
- // Implements the GetVertexBufferData function for GL.
- virtual ParseError GetVertexBufferData(ResourceId id,
- unsigned int offset,
- unsigned int size,
- void *data);
-
- // Implements the CreateIndexBuffer function for GL.
- virtual ParseError CreateIndexBuffer(ResourceId id,
- unsigned int size,
- unsigned int flags);
-
- // Implements the DestroyIndexBuffer function for GL.
- virtual ParseError DestroyIndexBuffer(ResourceId id);
-
- // Implements the SetIndexBufferData function for GL.
- virtual ParseError SetIndexBufferData(ResourceId id,
- unsigned int offset,
- unsigned int size,
- const void *data);
-
- // Implements the GetIndexBufferData function for GL.
- virtual ParseError GetIndexBufferData(ResourceId id,
- unsigned int offset,
- unsigned int size,
- void *data);
-
- // Implements the CreateVertexStruct function for GL.
- virtual ParseError CreateVertexStruct(ResourceId id,
- unsigned int input_count);
-
- // Implements the DestroyVertexStruct function for GL.
- virtual ParseError DestroyVertexStruct(ResourceId id);
-
- // Implements the SetVertexInput function for GL.
- virtual ParseError SetVertexInput(ResourceId vertex_struct_id,
- unsigned int input_index,
- ResourceId vertex_buffer_id,
- unsigned int offset,
- unsigned int stride,
- vertex_struct::Type type,
- vertex_struct::Semantic semantic,
- unsigned int semantic_index);
-
- // Implements the SetVertexStruct function for GL.
- virtual ParseError SetVertexStruct(ResourceId id);
-
- // Implements the Draw function for GL.
- virtual ParseError Draw(PrimitiveType primitive_type,
- unsigned int first,
- unsigned int count);
-
- // Implements the DrawIndexed function for GL.
- virtual ParseError DrawIndexed(PrimitiveType primitive_type,
- ResourceId index_buffer_id,
- unsigned int first,
- unsigned int count,
- unsigned int min_index,
- unsigned int max_index);
-
- // Implements the CreateEffect function for GL.
- virtual ParseError CreateEffect(ResourceId id,
- unsigned int size,
- const void *data);
-
- // Implements the DestroyEffect function for GL.
- virtual ParseError DestroyEffect(ResourceId id);
-
- // Implements the SetEffect function for GL.
- virtual ParseError SetEffect(ResourceId id);
-
- // Implements the GetParamCount function for GL.
- virtual ParseError GetParamCount(ResourceId id,
- unsigned int size,
- void *data);
-
- // Implements the CreateParam function for GL.
- virtual ParseError CreateParam(ResourceId param_id,
- ResourceId effect_id,
- unsigned int index);
-
- // Implements the CreateParamByName function for GL.
- virtual ParseError CreateParamByName(ResourceId param_id,
- ResourceId effect_id,
- unsigned int size,
- const void *name);
-
- // Implements the DestroyParam function for GL.
- virtual ParseError DestroyParam(ResourceId id);
-
- // Implements the SetParamData function for GL.
- virtual ParseError SetParamData(ResourceId id,
- unsigned int size,
- const void *data);
-
- // Implements the GetParamDesc function for GL.
- virtual ParseError GetParamDesc(ResourceId id,
- unsigned int size,
- void *data);
-
- // Implements the GetStreamCount function for GL.
- virtual ParseError GetStreamCount(ResourceId id,
- unsigned int size,
- void *data);
-
- // Implements the GetStreamDesc function for GL.
- virtual ParseError GetStreamDesc(ResourceId id,
- unsigned int index,
- unsigned int size,
- void *data);
-
- // Implements the CreateTexture2D function for GL.
- virtual ParseError CreateTexture2D(ResourceId id,
- unsigned int width,
- unsigned int height,
- unsigned int levels,
- texture::Format format,
- unsigned int flags,
- bool enable_render_surfaces);
-
- // Implements the CreateTexture3D function for GL.
- virtual ParseError CreateTexture3D(ResourceId id,
- unsigned int width,
- unsigned int height,
- unsigned int depth,
- unsigned int levels,
- texture::Format format,
- unsigned int flags,
- bool enable_render_surfaces);
-
- // Implements the CreateTextureCube function for GL.
- virtual ParseError CreateTextureCube(ResourceId id,
- unsigned int side,
- unsigned int levels,
- texture::Format format,
- unsigned int flags,
- bool enable_render_surfaces);
-
- // Implements the SetTextureData function for GL.
- virtual ParseError SetTextureData(ResourceId id,
- unsigned int x,
- unsigned int y,
- unsigned int z,
- unsigned int width,
- unsigned int height,
- unsigned int depth,
- unsigned int level,
- texture::Face face,
- unsigned int pitch,
- unsigned int slice_pitch,
- unsigned int size,
- const void *data);
-
- // Implements the GetTextureData function for GL.
- virtual ParseError GetTextureData(ResourceId id,
- unsigned int x,
- unsigned int y,
- unsigned int z,
- unsigned int width,
- unsigned int height,
- unsigned int depth,
- unsigned int level,
- texture::Face face,
- unsigned int pitch,
- unsigned int slice_pitch,
- unsigned int size,
- void *data);
-
- // Implements the DestroyTexture function for GL.
- virtual ParseError DestroyTexture(ResourceId id);
-
- // Implements the CreateSampler function for GL.
- virtual ParseError CreateSampler(ResourceId id);
-
- // Implements the DestroySampler function for GL.
- virtual ParseError DestroySampler(ResourceId id);
-
- // Implements the SetSamplerStates function for GL.
- virtual ParseError SetSamplerStates(ResourceId id,
- sampler::AddressingMode addressing_u,
- sampler::AddressingMode addressing_v,
- sampler::AddressingMode addressing_w,
- sampler::FilteringMode mag_filter,
- sampler::FilteringMode min_filter,
- sampler::FilteringMode mip_filter,
- unsigned int max_anisotropy);
-
- // Implements the SetSamplerBorderColor function for GL.
- virtual ParseError SetSamplerBorderColor(ResourceId id, const RGBA &color);
-
- // Implements the SetSamplerTexture function for GL.
- virtual ParseError SetSamplerTexture(ResourceId id, ResourceId texture_id);
-
- // Implements the SetScissor function for GL.
- virtual void SetScissor(bool enable,
- unsigned int x,
- unsigned int y,
- unsigned int width,
- unsigned int height);
-
- // Implements the SetPointLineRaster function for GL.
- virtual void SetPointLineRaster(bool line_smooth,
- bool point_sprite,
- float point_size);
-
- // Implements the SetPolygonOffset function for GL.
- virtual void SetPolygonOffset(float slope_factor, float units);
-
- // Implements the SetPolygonRaster function for GL.
- virtual void SetPolygonRaster(PolygonMode fill_mode,
- FaceCullMode cull_mode);
-
- // Implements the SetAlphaTest function for GL.
- virtual void SetAlphaTest(bool enable,
- float reference,
- Comparison comp);
-
- // Implements the SetDepthTest function for GL.
- virtual void SetDepthTest(bool enable,
- bool write_enable,
- Comparison comp);
-
- // Implements the SetStencilTest function for GL.
- virtual void SetStencilTest(bool enable,
- bool separate_ccw,
- unsigned int write_mask,
- unsigned int compare_mask,
- unsigned int ref,
- Uint32 func_ops);
-
- // Implements the SetColorWritefunction for GL.
- virtual void SetColorWrite(bool red,
- bool green,
- bool blue,
- bool alpha,
- bool dither);
-
- // Implements the SetBlending function for GL.
- virtual void SetBlending(bool enable,
- bool separate_alpha,
- BlendEq color_eq,
- BlendFunc color_src_func,
- BlendFunc color_dst_func,
- BlendEq alpha_eq,
- BlendFunc alpha_src_func,
- BlendFunc alpha_dst_func);
-
- // Implements the SetBlendingColor function for GL.
- virtual void SetBlendingColor(const RGBA &color);
-
- // Implements the CreateRenderSurface function for GL.
- virtual ParseError CreateRenderSurface(ResourceId id,
- unsigned int width,
- unsigned int height,
- unsigned int mip_level,
- unsigned int side,
- ResourceId texture_id);
-
- // Implements the DestroyRenderSurface function for GL.
- virtual ParseError DestroyRenderSurface(ResourceId id);
-
- // Implements the CreateDepthSurface function for GL.
- virtual ParseError CreateDepthSurface(ResourceId id,
- unsigned int width,
- unsigned int height);
-
- // Implements the DestroyDepthSurface function for GL.
- virtual ParseError DestroyDepthSurface(ResourceId id);
-
- // Implements the SetRenderSurface function for GL.
- virtual ParseError SetRenderSurface(ResourceId render_surface_id,
- ResourceId depth_stencil_id);
-
- // Implements the SetBackSurfaces function for GL.
- virtual void SetBackSurfaces();
-
- // Gets a vertex buffer by resource ID.
- VertexBufferGL *GetVertexBuffer(ResourceId id) {
- return vertex_buffers_.Get(id);
- }
-
- // Gets a texture by resource ID.
- TextureGL *GetTexture(ResourceId id) {
- return textures_.Get(id);
- }
-
- // Gets a sampler by resource ID.
- SamplerGL *GetSampler(ResourceId id) {
- return samplers_.Get(id);
- }
- void set_anti_aliased(bool anti_aliased) { anti_aliased_ = anti_aliased; }
-
- bool anti_aliased() const { return anti_aliased_; }
-
- CGcontext cg_context() const { return cg_context_; }
-
- EffectGL *current_effect() const { return current_effect_; }
- // "Dirty" the current effect. This resets the vertex and fragment program,
- // and requires ValidateEffect() to be called before further draws occur.
- void DirtyEffect();
- private:
- bool InitPlatformSpecific();
- bool InitCommon();
- // Validates the current vertex struct to GL, setting the vertex attributes.
- bool ValidateStreams();
- // Validates the current effect to GL. This sets the vertex and fragment
- // programs, and updates parameters if needed.
- bool ValidateEffect();
-
- CGcontext cg_context_;
-
-#if defined(OS_LINUX)
- XWindowWrapper *window_;
-#elif defined(OS_WIN)
- // Handle to the GL device.
- HWND hwnd_;
- HDC device_context_;
- HGLRC gl_context_;
-#endif
-
- bool anti_aliased_;
- ResourceId current_vertex_struct_;
- bool validate_streams_;
- unsigned int max_vertices_;
- ResourceId current_effect_id_;
- bool validate_effect_;
- EffectGL *current_effect_;
- ResourceId current_surface_id_;
- ResourceId current_depth_surface_id_;
- GLuint render_surface_framebuffer_;
-
- ResourceMap<VertexBufferGL> vertex_buffers_;
- ResourceMap<IndexBufferGL> index_buffers_;
- ResourceMap<VertexStructGL> vertex_structs_;
- ResourceMap<EffectGL> effects_;
- ResourceMap<EffectParamGL> effect_params_;
- ResourceMap<TextureGL> textures_;
- ResourceMap<SamplerGL> samplers_;
- ResourceMap<RenderSurfaceGL> render_surfaces_;
- ResourceMap<RenderDepthStencilSurfaceGL> depth_surfaces_;
-};
-
-} // namespace o3d
-} // namespace command_buffer
-
-#endif // GPU_COMMAND_BUFFER_SERVICE_GAPI_GL_H_
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