mirror of
https://github.com/DrBeef/QuakeQuest.git
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127 lines
8 KiB
C
127 lines
8 KiB
C
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#ifndef GL_BACKEND_H
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#define GL_BACKEND_H
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extern r_viewport_t gl_viewport;
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extern matrix4x4_t gl_modelmatrix;
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extern matrix4x4_t gl_viewmatrix;
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extern matrix4x4_t gl_modelviewmatrix;
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extern matrix4x4_t gl_projectionmatrix;
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extern matrix4x4_t gl_modelviewprojectionmatrix;
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extern float gl_modelview16f[16];
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extern float gl_modelviewprojection16f[16];
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extern qboolean gl_modelmatrixchanged;
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extern cvar_t gl_vbo_dynamicvertex;
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extern cvar_t gl_vbo_dynamicindex;
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#define POLYGONELEMENTS_MAXPOINTS 258
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extern int polygonelement3i[(POLYGONELEMENTS_MAXPOINTS-2)*3];
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extern unsigned short polygonelement3s[(POLYGONELEMENTS_MAXPOINTS-2)*3];
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#define QUADELEMENTS_MAXQUADS 128
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extern int quadelement3i[QUADELEMENTS_MAXQUADS*6];
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extern unsigned short quadelement3s[QUADELEMENTS_MAXQUADS*6];
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void R_Viewport_TransformToScreen(const r_viewport_t *v, const vec4_t in, vec4_t out);
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qboolean R_ScissorForBBox(const float *mins, const float *maxs, int *scissor);
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void R_Viewport_InitOrtho(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float x1, float y1, float x2, float y2, float zNear, float zFar, const float *nearplane);
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void R_Viewport_InitPerspective(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float zNear, float zFar, const float *nearplane);
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void R_Viewport_InitPerspectiveInfinite(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float zNear, const float *nearplane);
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void R_Viewport_InitCubeSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, float nearclip, float farclip, const float *nearplane);
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void R_Viewport_InitRectSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, int border, float nearclip, float farclip, const float *nearplane);
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void R_SetViewport(const r_viewport_t *v);
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void R_GetViewport(r_viewport_t *v);
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void GL_Finish(void);
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void GL_BlendFunc(int blendfunc1, int blendfunc2);
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void GL_BlendEquationSubtract(qboolean negated);
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void GL_DepthMask(int state);
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void GL_DepthTest(int state);
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void GL_DepthFunc(int state);
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void GL_DepthRange(float nearfrac, float farfrac);
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void R_SetStencilSeparate(qboolean enable, int writemask, int frontfail, int frontzfail, int frontzpass, int backfail, int backzfail, int backzpass, int frontcompare, int backcompare, int comparereference, int comparemask);
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void R_SetStencil(qboolean enable, int writemask, int fail, int zfail, int zpass, int compare, int comparereference, int comparemask);
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void GL_PolygonOffset(float planeoffset, float depthoffset);
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void GL_CullFace(int state);
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void GL_AlphaTest(int state);
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void GL_AlphaToCoverage(qboolean state);
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void GL_ColorMask(int r, int g, int b, int a);
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void GL_Color(float cr, float cg, float cb, float ca);
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void GL_ActiveTexture(unsigned int num);
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void GL_ClientActiveTexture(unsigned int num);
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void GL_Scissor(int x, int y, int width, int height);
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void GL_ScissorTest(int state);
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void GL_Clear(int mask, const float *colorvalue, float depthvalue, int stencilvalue);
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void GL_ReadPixelsBGRA(int x, int y, int width, int height, unsigned char *outpixels);
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int R_Mesh_CreateFramebufferObject(rtexture_t *depthtexture, rtexture_t *colortexture, rtexture_t *colortexture2, rtexture_t *colortexture3, rtexture_t *colortexture4);
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void R_Mesh_DestroyFramebufferObject(int fbo);
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void R_Mesh_SetRenderTargets(int fbo, rtexture_t *depthtexture, rtexture_t *colortexture, rtexture_t *colortexture2, rtexture_t *colortexture3, rtexture_t *colortexture4);
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unsigned int GL_Backend_CompileProgram(int vertexstrings_count, const char **vertexstrings_list, int geometrystrings_count, const char **geometrystrings_list, int fragmentstrings_count, const char **fragmentstrings_list);
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void GL_Backend_FreeProgram(unsigned int prog);
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extern cvar_t gl_paranoid;
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extern cvar_t gl_printcheckerror;
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// adds console variables and registers the render module (only call from GL_Init)
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void gl_backend_init(void);
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// starts mesh rendering for the frame
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void R_Mesh_Start(void);
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// ends mesh rendering for the frame
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// (only valid after R_Mesh_Start)
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void R_Mesh_Finish(void);
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// vertex buffer and index buffer creation/updating/freeing
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r_meshbuffer_t *R_Mesh_CreateMeshBuffer(const void *data, size_t size, const char *name, qboolean isindexbuffer, qboolean isuniformbuffer, qboolean isdynamic, qboolean isindex16);
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void R_Mesh_UpdateMeshBuffer(r_meshbuffer_t *buffer, const void *data, size_t size, qboolean subdata, size_t offset);
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void R_Mesh_DestroyMeshBuffer(r_meshbuffer_t *buffer);
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void GL_Mesh_ListVBOs(qboolean printeach);
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void R_Mesh_PrepareVertices_Vertex3f(int numvertices, const float *vertex3f, const r_meshbuffer_t *buffer, int bufferoffset);
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r_vertexgeneric_t *R_Mesh_PrepareVertices_Generic_Lock(int numvertices);
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qboolean R_Mesh_PrepareVertices_Generic_Unlock(void);
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void R_Mesh_PrepareVertices_Generic_Arrays(int numvertices, const float *vertex3f, const float *color4f, const float *texcoord2f);
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void R_Mesh_PrepareVertices_Generic(int numvertices, const r_vertexgeneric_t *vertex, const r_meshbuffer_t *vertexbuffer, int bufferoffset);
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r_vertexmesh_t *R_Mesh_PrepareVertices_Mesh_Lock(int numvertices);
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qboolean R_Mesh_PrepareVertices_Mesh_Unlock(void); // if this returns false, you need to prepare the mesh again!
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void R_Mesh_PrepareVertices_Mesh_Arrays(int numvertices, const float *vertex3f, const float *svector3f, const float *tvector3f, const float *normal3f, const float *color4f, const float *texcoordtexture2f, const float *texcoordlightmap2f);
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void R_Mesh_PrepareVertices_Mesh(int numvertices, const r_vertexmesh_t *vertex, const r_meshbuffer_t *buffer, int bufferoffset);
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// sets up the requested vertex transform matrix
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void R_EntityMatrix(const matrix4x4_t *matrix);
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// sets the vertex array pointer
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void R_Mesh_VertexPointer(int components, int gltype, size_t stride, const void *pointer, const r_meshbuffer_t *vertexbuffer, size_t bufferoffset);
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// sets the color array pointer (GL_Color only works when this is NULL)
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void R_Mesh_ColorPointer(int components, int gltype, size_t stride, const void *pointer, const r_meshbuffer_t *vertexbuffer, size_t bufferoffset);
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// sets the texcoord array pointer for an array unit, if GL_UNSIGNED_BYTE | 0x80000000 is specified it will be an unnormalized type (integer values)
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void R_Mesh_TexCoordPointer(unsigned int unitnum, int components, int gltype, size_t stride, const void *pointer, const r_meshbuffer_t *vertexbuffer, size_t bufferoffset);
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// returns current texture bound to this identifier
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int R_Mesh_TexBound(unsigned int unitnum, int id);
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// copies a section of the framebuffer to a 2D texture
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void R_Mesh_CopyToTexture(rtexture_t *tex, int tx, int ty, int sx, int sy, int width, int height);
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// bind a given texture to a given image unit
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void R_Mesh_TexBind(unsigned int unitnum, rtexture_t *tex);
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// sets the texcoord matrix for a texenv unit, can be NULL or blank (will use identity)
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void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix);
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// sets the combine state for a texenv unit
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void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale);
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// set up a blank texture state (unbinds all textures, texcoord pointers, and resets combine settings)
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void R_Mesh_ResetTextureState(void);
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// before a texture is freed, make sure there are no references to it
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void R_Mesh_ClearBindingsForTexture(int texnum);
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// renders a mesh
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void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtriangles, const int *element3i, const r_meshbuffer_t *element3i_indexbuffer, int element3i_bufferoffset, const unsigned short *element3s, const r_meshbuffer_t *element3s_indexbuffer, int element3s_bufferoffset);
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// saves a section of the rendered frame to a .tga or .jpg file
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qboolean SCR_ScreenShot(char *filename, unsigned char *buffer1, unsigned char *buffer2, int x, int y, int width, int height, qboolean flipx, qboolean flipy, qboolean flipdiagonal, qboolean jpeg, qboolean png, qboolean gammacorrect, qboolean keep_alpha);
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// used by R_Envmap_f and internally in backend, clears the frame
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void R_ClearScreen(qboolean fogcolor);
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#endif
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