Almost forgot...
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hpsolo
431
zsnes/src/linux/gl_draw.c
Normal file
431
zsnes/src/linux/gl_draw.c
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@@ -0,0 +1,431 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "SDL.h"
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#ifdef __OPENGL__
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#include <GL/gl.h>
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#endif
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#define BYTE unsigned char
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#define WORD unsigned short
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#define DWORD unsigned long
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typedef enum
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{ FALSE = 0, TRUE = !FALSE }
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BOOL;
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// SDL VIDEO VARIOABLES
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static SDL_Surface *surface;
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static int SurfaceX, SurfaceY;
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static int SurfaceLocking = 0;
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// OPENGL VARIABLES
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static unsigned short *glvidbuffer = 0;
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static GLuint gltextures[4];
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static int gltexture256, gltexture512;
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static int glfilters = GL_NEAREST;
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extern Uint8 En2xSaI, scanlines;
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extern Uint8 BilinearFilter;
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extern Uint8 FilteredGUI;
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extern Uint8 GUIOn2;
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extern unsigned int vidbuffer;
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int gl_start(int width, int height, int req_depth, int FullScreen)
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{
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Uint32 flags =
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SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWPALETTE | SDL_OPENGL;
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GLubyte scanbuffer[256];
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int i;
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flags |= (FullScreen ? SDL_FULLSCREEN : 0);
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
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SurfaceX = width; SurfaceY = height;
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surface = SDL_SetVideoMode(SurfaceX, SurfaceY, req_depth, flags);
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if (surface == NULL)
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{
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fprintf(stderr, "Could not set %dx%d-GL video mode.\n",
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SurfaceX, SurfaceY);
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return FALSE;
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}
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SurfaceLocking = SDL_MUSTLOCK(surface);
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SDL_WarpMouse(SurfaceX / 4, SurfaceY / 4);
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// Grab mouse in fullscreen mode
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FullScreen ? SDL_WM_GrabInput(SDL_GRAB_ON) :
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SDL_WM_GrabInput(SDL_GRAB_OFF);
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SDL_WM_SetCaption("ZSNES-GL Linux", "ZSNES");
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SDL_ShowCursor(0);
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/* Setup some GL stuff */
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glvidbuffer = malloc(512 * 512 * 2);
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glEnable(GL_TEXTURE_1D);
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glEnable(GL_TEXTURE_2D);
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glViewport(0, 0, SurfaceX, SurfaceY);
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/*
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* gltextures[0]: 2D texture, 256x224
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* gltextures[1]: 2D texture, Left half of 512x224
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* gltextures[2]: 2D texture, Right half of 512x224
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* gltextures[3]: 1D texture, 256 lines of alternating alpha
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*/
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glGenTextures(4, gltextures);
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/* Initialize the scanline texture (alternating opaque/transparent) */
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for (i = 0; i < 256; i += 2)
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{
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scanbuffer[i] = 0xff;
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scanbuffer[i + 1] = 0;
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}
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glBindTexture(GL_TEXTURE_1D, gltextures[3]);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE_ALPHA, 256, 0, GL_ALPHA,
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GL_UNSIGNED_BYTE, scanbuffer);
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return TRUE;
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}
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void gl_end()
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{
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glDeleteTextures(4, gltextures);
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free(glvidbuffer);
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}
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static void LockSurface(void)
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{
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if (SurfaceLocking)
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SDL_LockSurface(surface);
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}
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static void UnlockSurface(void)
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{
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if (SurfaceLocking)
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SDL_UnlockSurface(surface);
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SDL_GL_SwapBuffers();
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}
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extern DWORD AddEndBytes;
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extern DWORD NumBytesPerLine;
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extern unsigned char *WinVidMemStart;
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extern unsigned char FPUCopy;
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extern unsigned char NGNoTransp;
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extern unsigned char newengen;
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extern void copy640x480x16bwin(void);
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extern unsigned char SpecialLine[224]; /* 0 if lo-res, > 0 if hi-res */
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void gl_clearwin()
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{
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glClear(GL_COLOR_BUFFER_BIT);
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if (En2xSaI)
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memset(glvidbuffer, 0, 512 * 448 * 2);
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}
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/* gl_drawspan:
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* Puts a quad on the screen for hires/lores portions, starting at line start,
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* and ending at line end..
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* Builds the 256x256/512x256 textures if gltexture256 or gltexture512 == 0
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*/
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static void gl_drawspan(int hires, int start, int end)
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{
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int i, j;
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if (hires)
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{
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if (!gltexture512)
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{
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unsigned short *vbuf1 =
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&((unsigned short *) vidbuffer)[16];
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unsigned short *vbuf2 =
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&((unsigned short *) vidbuffer)[75036 * 2 + 16];
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unsigned short *vbuf = &glvidbuffer[0];
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for (j = 0; j < 224; j++)
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{
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for (i = 0; i < 256; i++)
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{
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*vbuf++ = *vbuf1++;
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*vbuf++ = *vbuf2++;
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}
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vbuf1 += 32;
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vbuf2 += 32; // skip the two 16-pixel-wide columns
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}
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glBindTexture(GL_TEXTURE_2D, gltextures[1]);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 512);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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glvidbuffer + 512);
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glBindTexture(GL_TEXTURE_2D, gltextures[2]);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 256);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 512);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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glvidbuffer + 512);
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gltexture512 = 1;
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}
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glBindTexture(GL_TEXTURE_2D, gltextures[1]);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(-1.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(0.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(0.0f, (112 - end) / 112.0);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(-1.0f, (112 - end) / 112.0);
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glEnd();
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glBindTexture(GL_TEXTURE_2D, gltextures[2]);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(0.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(1.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(1.0f, (112 - end) / 112.0);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(0.0f, (112 - end) / 112.0);
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glEnd();
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}
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else
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{
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glBindTexture(GL_TEXTURE_2D, gltextures[0]);
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if (!gltexture256)
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{
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 16);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 288);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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((unsigned short *) vidbuffer) + 288);
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gltexture256 = 1;
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}
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(-1.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (start / 224.0));
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glVertex2f(1.0f, (112 - start) / 112.0);
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glTexCoord2f(1.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(1.0f, (112 - end) / 112.0);
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glTexCoord2f(0.0f, (224.0 / 256.0) * (end / 224.0));
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glVertex2f(-1.0f, (112 - end) / 112.0);
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glEnd();
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}
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}
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void gl_drawwin()
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{
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int i;
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NGNoTransp = 0; // Set this value to 1 within the appropriate
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// video mode if you want to add a custom
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// transparency routine or hardware
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// transparency. This only works if
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// the value of newengen is equal to 1.
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// (see ProcessTransparencies in newgfx16.asm
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// for ZSNES' current transparency code)
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LockSurface();
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if (BilinearFilter)
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{
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glfilters = GL_LINEAR;
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if (GUIOn2 && !FilteredGUI)
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glfilters = GL_NEAREST;
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}
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else
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{
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glfilters = GL_NEAREST;
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}
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glLoadIdentity();
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if (En2xSaI)
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{
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/* We have to use copy640x480x16bwin for 2xSaI */
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AddEndBytes = 0;
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NumBytesPerLine = 1024;
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WinVidMemStart = (void *) glvidbuffer;
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__asm__ __volatile__("call copy640x480x16bwin"
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::: "memory", "eax", "ebx", "ecx", "edx", "esi", "edi");
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/* Display 4 256x256 quads for the 512x448 buffer */
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glfilters);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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/* Upper left quad */
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 512);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5, glvidbuffer);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f);
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glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f);
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glVertex3f(0.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, (224.0 / 256.0));
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glVertex3f(0.0f, 0.0f, -1.0f);
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glTexCoord2f(0.0f, (224.0 / 256.0));
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glVertex3f(-1.0f, 0.0f, -1.0f);
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glEnd();
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/* Upper right quad */
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 512);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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glvidbuffer + 256);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f);
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glVertex3f(0.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f);
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glVertex3f(1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, (224.0 / 256.0));
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glVertex3f(1.0f, 0.0f, -1.0f);
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glTexCoord2f(0.0f, (224.0 / 256.0));
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glVertex3f(0.0f, 0.0f, -1.0f);
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glEnd();
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/* Lower left quad */
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 512);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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glvidbuffer + 512 * 224);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f);
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glVertex3f(-1.0f, 0.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, -1.0f);
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glTexCoord2f(1.0f, (224.0 / 256.0));
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glVertex3f(0.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, (224.0 / 256.0));
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glVertex3f(-1.0f, -1.0f, -1.0f);
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glEnd();
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/* Lower right quad */
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glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0,
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GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
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glvidbuffer + 512 * 224 + 256);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f);
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glVertex3f(1.0f, 0.0f, -1.0f);
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glTexCoord2f(1.0f, (224.0 / 256.0));
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glVertex3f(1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, (224.0 / 256.0));
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glVertex3f(0.0f, -1.0f, -1.0f);
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glEnd();
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}
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else
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{
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/*
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* This code splits the hires/lores portions up, and draws
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* them with gl_drawspan
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*/
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int lasthires, lasthires_line = 0;
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gltexture256 = gltexture512 = 0;
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lasthires = SpecialLine[1];
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for (i = 1; i < 222; i++)
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{
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if (SpecialLine[i + 1])
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{
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if (lasthires)
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continue;
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gl_drawspan(lasthires, lasthires_line, i);
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lasthires = SpecialLine[i + 1];
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lasthires_line = i;
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}
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else
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{
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if (!lasthires)
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continue;
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gl_drawspan(lasthires, lasthires_line, i);
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lasthires = SpecialLine[i + 1];
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lasthires_line = i;
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}
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}
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gl_drawspan(lasthires, lasthires_line, i);
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/*
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* This is here rather than right outside this if because the
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* GUI doesn't allow scanlines to be selected while filters are
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* on.. There is no technical reason they can't be on while
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* filters are on, however. Feel free to change the GUI, and
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* move this outside the if (En2xSaI) {}, if you do.
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*/
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if (scanlines)
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{
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glDisable(GL_TEXTURE_2D);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glBindTexture(GL_TEXTURE_1D, gltextures[3]);
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glColor4f(1.0f, 1.0f, 1.0f,
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scanlines == 1 ? 1.0f : (scanlines ==
|
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2 ? 0.25f : 0.50f));
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for (i = 0; i < SurfaceY; i += 256)
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{
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glBegin(GL_QUADS);
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glTexCoord1f(0.0f);
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glVertex3f(-1.0f,
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(SurfaceY - i * 2.0) / SurfaceY,
|
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-1.0f);
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glTexCoord1f(0.0f);
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glVertex3f(1.0f,
|
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(SurfaceY - i * 2.0) / SurfaceY,
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-1.0f);
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||||
glTexCoord1f(1.0f);
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glVertex3f(1.0f,
|
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(SurfaceY -
|
||||
(i + 256) * 2.0) / SurfaceY, -1.0f);
|
||||
glTexCoord1f(1.0f);
|
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glVertex3f(-1.0f,
|
||||
(SurfaceY -
|
||||
(i + 256) * 2.0) / SurfaceY, -1.0f);
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||||
glEnd();
|
||||
}
|
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glDisable(GL_BLEND);
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glEnable(GL_TEXTURE_2D);
|
||||
}
|
||||
}
|
||||
UnlockSurface();
|
||||
}
|
||||
Reference in New Issue
Block a user