73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
#include "zbuffer.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include <gint/display.h>
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#include <gint/std/stdio.h>
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#include <gint/std/stdlib.h>
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#include <gint/keyboard.h>
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#include <gint/dma.h>
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/** size_uint32
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* taille du zbuffer exprimée en uint32_t
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* utile pour l'effacement du zbuffer sur sh3
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**/
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static const uint32_t size_uint32 = FE_ZB_SIZE_X*FE_ZB_SIZE_Y;
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/** size_char
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* taille du zbuffer exprimée en octets
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* sera utile pour le DMA Controller
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**/
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static const uint32_t size_char = size_uint32*sizeof(int32_t);
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/** address
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* addresse du zbuffer
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**/
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static int32_t* address=0;
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const int32_t clearval=3000;
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void FE_zbuffer_clear()
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{
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if (address==0)
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{
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address = malloc(size_char);
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if (address==0) // cas de figure où il n'y a plus assez de RAM
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{
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dclear(C_WHITE);
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dtext(1, 1, "Not enough RAM...", C_BLACK, C_NONE);
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dupdate();
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while (1==1)
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getkey();
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}
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}
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// TODO déterminer le type d'effacement
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if (isSH3())
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{ // effacement fait par le CPU
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uint32_t indice;
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for (indice = 0; indice < size_uint32; indice ++)
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address[indice] = clearval;
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}
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else
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{ // effacement fait par le DMA
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dma_transfer(0, DMA_32B, size_uint32, &clearval, DMA_FIXED,
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address, DMA_INC);
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}
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}
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bool FE_zbuffer_set_dist(int32_t x, int32_t y, int32_t dist)
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{
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x %= FE_ZB_SIZE_X;
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y %= FE_ZB_SIZE_Y;
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const uint32_t indice = x * 64 + y;
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if (address[indice]>dist && dist>0)
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{
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address[indice] = dist;
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return true;
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}
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else
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return false;
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}
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