WDL/gpu/gpu.h

   1 /*
   2     WDL - gpu.h
   3     Copyright (C) 2007 Cockos Incorporated
   4
   5     This software is provided 'as-is', without any express or implied
   6     warranty.  In no event will the authors be held liable for any damages
   7     arising from the use of this software.
   8
   9     Permission is granted to anyone to use this software for any purpose,
  10     including commercial applications, and to alter it and redistribute it
  11     freely, subject to the following restrictions:
  12
  13     1. The origin of this software must not be misrepresented; you must not
  14        claim that you wrote the original software. If you use this software
  15        in a product, an acknowledgment in the product documentation would be
  16        appreciated but is not required.
  17     2. Altered source versions must be plainly marked as such, and must not be
  18        misrepresented as being the original software.
  19     3. This notice may not be removed or altered from any source distribution.
  20
  21 */
  22
  23 #ifndef _WDL_GPU_H
  24 #define _WDL_GPU_H
  25
  26 #ifdef _WIN32
  27
  28 #include <windows.h>
  29 #include <gl/gl.h>
  30 #include "wglext.h"
  31
  32 #include "../wingui/membitmap.h"
  33
  34 class WDL_GPU_Surface;
  35
  36 class WDL_GPU
  37 {
  38 public:
  39   WDL_GPU();
  40   ~WDL_GPU();
  41
  42   int init(HWND hwnd);
  43   void release();
  44   int isInited() { return m_glDll != NULL; }
  45
  46   WDL_GPU_Surface *createSurface(WDL_WinMemBitmap *bm, int w, int h);
  47
  48   HGLRC (WINAPI *wglCreateContext)(HDC dc);
  49   BOOL  (WINAPI *wglMakeCurrent)(HDC dc, HGLRC rc);
  50   BOOL  (WINAPI *wglDeleteContext)(HGLRC rc);
  51   PROC (WINAPI *wglGetProcAddress)(LPCSTR name);
  52
  53   void (WINAPI *glClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
  54   void (WINAPI *glClear)(GLbitfield mask);
  55   void (WINAPI *glEnable)(GLenum cap);
  56   void (WINAPI *glDisable)(GLenum cap);
  57   void (WINAPI *glBlendFunc)(GLenum sfactor, GLenum dfactor);
  58   void (WINAPI *glLineWidth)(GLfloat width);
  59   void (WINAPI *glColor3f)(GLfloat red, GLfloat green, GLfloat blue);
  60   void (WINAPI *glBegin)(GLenum mode);
  61   void (WINAPI *glEnd)();
  62   void (WINAPI *glVertex2f)(GLfloat x, GLfloat y);
  63   void (WINAPI *glFlush)();
  64   void (WINAPI *glFinish)();
  65   const GLubyte *(WINAPI *glGetString)(GLenum name);
  66   void (WINAPI *glReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
  67
  68   // WGL_ARB_extensions_string
  69   PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB;
  70
  71   // WGL_ARB_pbuffer
  72   PFNWGLCREATEPBUFFERARBPROC    wglCreatePbufferARB;
  73   PFNWGLGETPBUFFERDCARBPROC     wglGetPbufferDCARB;
  74   PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB;
  75   PFNWGLDESTROYPBUFFERARBPROC   wglDestroyPbufferARB;
  76   PFNWGLQUERYPBUFFERARBPROC     wglQueryPbufferARB;
  77
  78   // WGL_ARB_pixel_format
  79   PFNWGLGETPIXELFORMATATTRIBIVARBPROC wglGetPixelFormatAttribivARB;
  80   PFNWGLGETPIXELFORMATATTRIBFVARBPROC wglGetPixelFormatAttribfvARB;
  81   PFNWGLCHOOSEPIXELFORMATARBPROC      wglChoosePixelFormatARB;
  82
  83   HINSTANCE m_glDll;
  84   HWND m_hwnd;
  85   HGLRC m_rc;
  86 };
  87
  88 class WDL_GPU_Surface
  89 {
  90 public:
  91   WDL_GPU_Surface(WDL_GPU *parent, WDL_WinMemBitmap *bm, int w, int h);
  92   ~WDL_GPU_Surface();
  93
  94   void clear(float cr, float cg, float cb);
  95   void beginScene();
  96   void setLineAA(int on);
  97   void beginLine(float cr, float cg, float cb);
  98   void end();
  99   void drawLine(int x1, int y1, int x2, int y2);
 100   void flush();
 101   void blit();
 102
 103 private:
 104   WDL_GPU *m_parent;
 105   WDL_WinMemBitmap *m_bm;
 106   HBITMAP m_oldbm, m_bmp;
 107   int m_w, m_h;
 108
 109   HPBUFFERARB m_hPBuffer;
 110   HDC         m_hDC;
 111   HGLRC       m_hRC;
 112   void *m_bits;
 113 };
 114
 115 #else
 116
 117 //todo
 118
 119 #endif
 120
 121 #endif