129 lines
5.1 KiB
C
129 lines
5.1 KiB
C
// Change the debug font face and colors !
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// Schnappy 2020
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#include <sys/types.h>
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#include <stdio.h>
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#include <libgte.h>
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#include <libetc.h>
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#include <libgpu.h>
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#define VMODE 0 // Video Mode : 0 : NTSC, 1: PAL
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#define SCREENXRES 320 // Screen width
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#define SCREENYRES 240 // Screen height
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#define CENTERX SCREENXRES/2 // Center of screen on x
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#define CENTERY SCREENYRES/2 // Center of screen on y
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#define MARGINX 96 // margins for text display
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#define MARGINY 64
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#define FONTSIZE 8 * 7 // Text Field Height
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DISPENV disp[2]; // Double buffered DISPENV and DRAWENV
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DRAWENV draw[2];
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short db = 0; // index of which buffer is used, values 0, 1
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#define FONTX 960
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#define FONTY 0
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// Two color vectors R,G,B
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CVECTOR fntColor = { 255, 0, 0 };
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CVECTOR fntColorBG = { 0, 0, 0 };
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extern unsigned long _binary_fnt_tim_start[];
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extern unsigned long _binary_fnt_tim_end[];
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extern unsigned long _binary_fnt_tim_length;
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// Loading an image to vram. See https://github.com/ABelliqueux/nolibgs_hello_worlds/blob/main/hello_sprt/hello_sprt.c#L42
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TIM_IMAGE fontface;
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void LoadTexture(u_long * tim, TIM_IMAGE * tparam){
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OpenTIM(tim);
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ReadTIM(tparam);
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LoadImage(tparam->prect, tparam->paddr);
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DrawSync(0);
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if (tparam->mode & 0x8){ // check 4th bit
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LoadImage(tparam->crect, tparam->caddr);
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DrawSync(0);
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}
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}
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void FntColor(CVECTOR fgcol, CVECTOR bgcol )
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{
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// The debug font clut is at tx, ty + 128
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// tx = bg color
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// tx + 1 = fg color
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// We can override the color by drawing a rect at these coordinates
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//
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// Define 1 pixel at 960,128 (background color) and 1 pixel at 961, 128 (foreground color)
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RECT fg = { FONTX+1, FONTY + 128, 1, 1 };
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RECT bg = { FONTX, FONTY + 128, 1, 1 };
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// Set colors
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ClearImage(&fg, fgcol.r, fgcol.g, fgcol.b);
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ClearImage(&bg, bgcol.r, bgcol.g, bgcol.b);
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}
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void init(void)
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{
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ResetGraph(0); // Initialize drawing engine with a complete reset (0)
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SetDefDispEnv(&disp[0], 0, 0 , SCREENXRES, SCREENYRES); // Set display area for both &disp[0] and &disp[1]
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SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES); // &disp[0] is on top of &disp[1]
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SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES); // Set draw for both &draw[0] and &draw[1]
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SetDefDrawEnv(&draw[1], 0, 0 , SCREENXRES, SCREENYRES); // &draw[0] is below &draw[1]
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if (VMODE) // PAL
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{
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SetVideoMode(MODE_PAL);
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disp[0].screen.y += 8; // add offset : 240 + 8 + 8 = 256
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disp[1].screen.y += 8;
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}
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SetDispMask(1); // Display on screen
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setRGB0(&draw[0], 50, 50, 50); // set color for first draw area
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setRGB0(&draw[1], 50, 50, 50); // set color for second draw area
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draw[0].isbg = 1; // set mask for draw areas. 1 means repainting the area with the RGB color each frame
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draw[1].isbg = 1;
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PutDispEnv(&disp[db]); // set the disp and draw environnments
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PutDrawEnv(&draw[db]);
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FntLoad(960, 0); // Load font to vram at 960,0(+128)
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FntOpen(MARGINX, MARGINY, SCREENXRES, SCREENXRES, 0, 280 ); // FntOpen(x, y, width, height, black_bg, max. nbr. chars
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}
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void display(void)
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{
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DrawSync(0); // Wait for all drawing to terminate
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VSync(0); // Wait for the next vertical blank
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PutDispEnv(&disp[db]); // set alternate disp and draw environnments
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PutDrawEnv(&draw[db]);
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db = !db; // flip db value (0 or 1)
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}
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int main(void)
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{
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u_int t = 0;
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u_short step = 10;
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u_char * channel, * prevChannel;
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channel = &fntColor.r;
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prevChannel = &fntColor.b;
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init(); // execute init()
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LoadTexture(_binary_fnt_tim_start, &fontface);
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FntColor(fntColor, fntColorBG);
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while (1) // infinite loop
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{
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t++;
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if (fntColor.r >= 254 - step ){channel = &fntColor.g; prevChannel = &fntColor.r;}
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if (fntColor.g >= 254 - step ){channel = &fntColor.b; prevChannel = &fntColor.g;}
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if (fntColor.b >= 254 - step ){channel = &fntColor.r; prevChannel = &fntColor.b;}
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*channel += step;
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if (*prevChannel){
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*prevChannel -= step;
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}
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//~ fntColorBG.g = 255 - color ;
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FntColor(fntColor, fntColorBG);
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// 4lines, 16 glyphs on each line
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// Glyphs are 5x7 pixels wide in 16bpp,
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FntPrint("!\"#$%%&'()*+,-./\n");
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FntPrint("0123456789:;<=^?\n");
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FntPrint("@ABCDEFGHIJKLMNO\n");
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FntPrint("PQRSTUVWXYZ[\\]>");
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FntPrint("\n\nHELLO DEBUG FONT! %d", t);
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FntFlush(-1); // Draw print stream
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display(); // Execute display()
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}
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return 0;
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}
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