C语言和Lua编写的连连看源码(OpenGL)

#include "render.h" #include <malloc.h> #include <gl/gl.h> #include <gl/glu.h> #pragma comment(lib, "OpenGL32.lib") #pragma comment(lib, "glu32.lib") struct Canvas { int w; int h; int alpha; GLuint texture; }; typedef int (__stdcall *SWAPBUFFERS)(HDC); static SWAPBUFFERS wglSwapBuffers = NULL; static HDC G_hdc = NULL; static HGLRC G_hrc = NULL; static int G_lock = 0; static PIXELFORMATDESCRIPTOR G_pfd = { sizeof(PIXELFORMATDESCRIPTOR), // 上述格式描述符的大小 1, // 版本号 PFD_DRAW_TO_WINDOW | // 格式支持窗口 PFD_SUPPORT_OPENGL | // 格式必须支持OpenGL PFD_DOUBLEBUFFER, // 必须支持双缓冲 PFD_TYPE_RGBA, // 申请 RGBA 格式 0, // 选定色彩深度 0, 0, 0, 0, 0, 0, // 忽略的色彩位 0, // 无Alpha缓存 0, // 忽略Shift Bit 0, // 无累加缓存 0, 0, 0, 0, // 忽略聚集位 16, // 16位 Z-缓存 (深度缓存) 0, // 无蒙板缓存 0, // 无辅助缓存 PFD_MAIN_PLANE, // 主绘图层 0, // Reserved 0, 0, 0 // 忽略层遮罩 }; int Render_Init(HDC hdc, int w, int h, int bpp) { int pf; HMODULE dll = NULL; G_hdc = hdc; G_pfd.cColorBits = bpp; if ( !(pf = ChoosePixelFormat(hdc, &G_pfd)) ) return 0; if ( !SetPixelFormat(hdc, pf, &G_pfd) ) return 0; if ( !(G_hrc = wglCreateContext(hdc)) ) return 0; if ( !wglMakeCurrent(hdc, G_hrc) ) return 0; if ( !(dll = LoadLibrary("OpenGL32.dll")) ) return 0; if ( !(wglSwapBuffers = (SWAPBUFFERS)GetProcAddress(dll, "wglSwapBuffers")) ) wglSwapBuffers = SwapBuffers; G_lock = 0; glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); glClearColor(0.0f, 0.0f, 0.0f, 0.0f); glClearDepth(1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); Render_Reshape(w, h); return 1; } void Render_Reshape(int w, int h) { glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0f, (GLfloat)w, 0.0f, (GLfloat)h); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void Render_Ready() { if ( G_lock++ == 0 ) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); } void Render_Finish() { if ( --G_lock == 0 ) wglSwapBuffers(G_hdc); } Canvas * Render_GenCanvas(Bitmap *dib) { GLuint tex; Canvas *canvas = (Canvas *)malloc(sizeof(Canvas)); if ( !canvas ) return NULL; glEnable(GL_TEXTURE_2D); glGenTextures(1, &tex); glBindTexture(GL_TEXTURE_2D, tex); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dib->w, dib->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, dib->buf); canvas->w = dib->w; canvas->h = dib->h; canvas->alpha = dib->alpha; canvas->texture = tex; return canvas; } void Render_Color(float r, float g, float b) { glColor3f(r, g, b); } void Render_Line(int sx, int sy, int dx, int dy) { glDisable(GL_TEXTURE_2D); glBegin(GL_LINES); glVertex2f((GLfloat)sx, (GLfloat)sy); glVertex2f((GLfloat)dx, (GLfloat)dy); glEnd(); glEnable(GL_TEXTURE_2D); } void Render_Canvas(Canvas *canvas, int x, int y, int w, int h) { glColor3f(1.0f, 1.0f, 1.0f); glBindTexture(GL_TEXTURE_2D, canvas->texture); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex2f((GLfloat)x, (GLfloat)y); glTexCoord2f(1.0f, 0.0f); glVertex2f((GLfloat)(x+w), (GLfloat)y); glTexCoord2f(1.0f, 1.0f); glVertex2f((GLfloat)(x+w), (GLfloat)(y+h)); glTexCoord2f(0.0f, 1.0f); glVertex2f((GLfloat)x, (GLfloat)(y+h)); glEnd(); } void Render_SubCanvas(Canvas *canvas, int sx, int sy, int sw, int sh, int x, int y, int w, int h) { GLfloat src_x = sx > 0 ? (GLfloat)sx / (GLfloat)canvas->w : 0.0f; GLfloat src_y = sy > 0 ? (GLfloat)sy / (GLfloat)canvas->h : 0.0f; GLfloat src_w = (GLfloat)sw / (GLfloat)canvas->w; GLfloat src_h = (GLfloat)sh / (GLfloat)canvas->h; glColor3f(1.0f, 1.0f, 1.0f); glBegin(GL_QUADS); glTexCoord2f(src_x, src_y); glVertex2f((GLfloat)x, (GLfloat)y); glTexCoord2f(src_x+src_w, src_y); glVertex2f((GLfloat)(x+w), (GLfloat)y); glTexCoord2f(src_x+src_w, src_y+src_h); glVertex2f((GLfloat)(x+w), (GLfloat)(y+h)); glTexCoord2f(src_x, src_y+src_h); glVertex2f((GLfloat)x, (GLfloat)(y+h)); glEnd(); } void Render_Release() { if ( G_hrc ) { wglMakeCurrent(NULL, NULL); wglDeleteContext(G_hrc); } } /* END */