piwalker/hello_ps2
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drawing a triangle!

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This commit is contained in:
Samuel Walker 2025-03-27 23:27:06 -06:00
parent 9ddea4214e
commit 2a131e300c
1 changed files with 33 additions and 9 deletions
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42
main.c
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@ -1,3 +1,4 @@
#include "draw_buffers.h"
#include "draw_primitives.h"
#include "graph_vram.h"
#include "gs_psm.h"
@ -10,6 +11,7 @@
#include <draw.h>
#include <stdio.h>
#include <inttypes.h>
#include <gs_gp.h>
#ifdef DEBUG
#define DEBUG_MSG(...) printf(__VA_ARGS__)
@ -33,6 +35,7 @@ int print_buffer(qword_t *b, int len) {
int gs_finish() {
qword_t buff[50];
qword_t *q = buff;
//TODO: Remove!
q = draw_primitive_xyoffset(q, 0, 0, 0);
q = draw_finish(q);
dma_channel_send_normal(DMA_CHANNEL_GIF, buff, q-buff, 0, 0);
@ -41,13 +44,28 @@ int gs_finish() {
}
int gs_init(int width, int height, int psm, int psmz, int vmode, int gmode) {
int fb_address = graph_vram_allocate(width, height, psm, GRAPH_ALIGN_PAGE);
framebuffer_t fb;
fb.address = graph_vram_allocate(width, height, psm, GRAPH_ALIGN_PAGE);
fb.width = width;
fb.height = height;
fb.psm = psm;
fb.mask = 0;
zbuffer_t zb;
zb.address = graph_vram_allocate(width, height, psmz, GRAPH_ALIGN_PAGE);
zb.enable = 0;
zb.method = 0;
zb.zsm = psmz;
zb.mask = 0;
graph_set_mode(gmode, vmode, GRAPH_MODE_FIELD, GRAPH_DISABLE);
graph_set_screen(OFFSET_X, OFFSET_Y, width, height);
graph_set_bgcolor(0, 0, 0);
graph_set_framebuffer_filtered(fb_address, width, psm, 0, 0);
graph_set_framebuffer_filtered(fb.address, width, psm, 0, 0);
graph_enable_output();
qword_t buf[100];
qword_t *q = buf;
q = draw_setup_environment(q, 0, &fb, &zb);
dma_channel_send_normal(DMA_CHANNEL_GIF, buf, q-buf, 0, 0);
dma_wait_fast();
gs_finish();
return 0;
}
@ -58,6 +76,8 @@ static int tri[] = {
20, 400, 0
};
#define SHIFT_AS_I64(x, b) (((uint64_t)x)<<b);
int draw() {
uint64_t red = 0xf0;
@ -66,17 +86,21 @@ int draw() {
qword_t buf[50];
qword_t *q = buf;
// GIFTag header - 3x(col, pos)
q->dw[0] = 0x6000000000008001;
q->dw[1] = 0x0000000000515151;
q->dw[0] = 0x7000000000008001;
q->dw[1] = 0x0000000005151510;
q++;
q->dw[0] = GS_PRIM_TRIANGLE;
q->dw[1] = 0;
q++;
for(int i = 0; i < 3; i++){
q->dw[0] = (red&0xff) | (green&0xff)<<32;
q->dw[1] = (blue&0xff) | (0x80 << 32);
q->dw[1] = (blue&0xff) | SHIFT_AS_I64(0x80, 32);
q++;
q->dw[0] = (tri[i+0]<<4) | (tri[i+1]<<4)<<32;
q->dw[1] = (tri[i+2]<<4);
q->dw[0] = (tri[i*3+0]<<4) | SHIFT_AS_I64(tri[i*3+1]<<4,32);
q->dw[1] = (tri[i*3+2]<<4);
q++;
}
@ -98,7 +122,7 @@ int main() {
dma_channel_fast_waits(DMA_CHANNEL_GIF);
DEBUG_MSG("DMA Initialized...\n");
// initialize graphics mode
gs_init(664, 480, GS_PSM_32, GS_PSMZ_32, GRAPH_MODE_NTSC, GRAPH_MODE_FIELD);
gs_init(640, 480, GS_PSM_32, GS_PSMZ_24, GRAPH_MODE_NTSC, GRAPH_MODE_INTERLACED);
DEBUG_MSG("GS Initialized...\n");
// clear screen
draw();