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/*
* LibPSn00b Example Programs
*
* Hello World Example
* 2019-2020 Meido-Tek Productions / PSn00bSDK Project
*
* The obligatory hello world example normally included in nearly every
* SDK package. This example should also get you started in how to manage
* the display using psxgpu.
*
* Example by Lameguy64
*
*
* Changelog:
*
* January 1, 2020 - Initial version
*/
#include <stdio.h>
#include <sys/types.h>
#include <psxetc.h>
#include <psxgte.h>
#include <psxgpu.h>
// Define display/draw environments for double buffering
DISPENV disp[2];
DRAWENV draw[2];
int db;
// Init function
void init(void)
{
// This not only resets the GPU but it also installs the library's
// ISR subsystem to the kernel
ResetGraph(0);
// Define display environments, first on top and second on bottom
SetDefDispEnv(&disp[0], 0, 0, 320, 240);
SetDefDispEnv(&disp[1], 0, 240, 320, 240);
// Define drawing environments, first on bottom and second on top
SetDefDrawEnv(&draw[0], 0, 240, 320, 240);
SetDefDrawEnv(&draw[1], 0, 0, 320, 240);
// Set and enable clear color
setRGB0(&draw[0], 0, 96, 0);
setRGB0(&draw[1], 0, 96, 0);
draw[0].isbg = 1;
draw[1].isbg = 1;
// Clear double buffer counter
db = 0;
// Apply the GPU environments
PutDispEnv(&disp[db]);
PutDrawEnv(&draw[db]);
// Load test font
FntLoad(960, 0);
// Open up a test font text stream of 100 characters
FntOpen(0, 8, 320, 224, 0, 100);
}
// Display function
void display(void)
{
// Flip buffer index
db = !db;
// Wait for all drawing to complete
DrawSync(0);
// Wait for vertical sync to cap the logic to 60fps (or 50 in PAL mode)
// and prevent screen tearing
VSync(0);
// Switch pages
PutDispEnv(&disp[db]);
PutDrawEnv(&draw[db]);
// Enable display output, ResetGraph() disables it by default
SetDispMask(1);
}
// Main function, program entrypoint
int main(int argc, const char *argv[])
{
int counter;
// Init stuff
init();
// Main loop
counter = 0;
while(1)
{
// Print the obligatory hello world and counter to show that the
// program isn't locking up to the last created text stream
FntPrint(-1, "HELLO WORLD\n");
FntPrint(-1, "COUNTER=%d\n", counter);
// Draw the last created text stream
FntFlush(-1);
// Update display
display();
// Increment the counter
counter++;
}
return 0;
}
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