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cool-bun-demo
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Move blitter commoon stuff to blitter header

This commit is contained in:
John Bintz 2024-09-22 06:52:22 -04:00
parent c76af7faf8
commit bd035eaea1
3 changed files with 24 additions and 19 deletions
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11
bun.c
View File

@ -13,6 +13,7 @@
#include "screen.h"
#include "bun.h"
#include "system/system.h"
#include "system/blitter.h"
#define COOL_BUN_WIDTH (32)
#define COOL_BUN_WIDTH_BYTES (COOL_BUN_WIDTH / 8)
@ -40,16 +41,8 @@
// linked as raw bytes in assembler
extern unsigned char chip coolbun[];
#define BLTCON0( \
minterm, aChan, bChan, cChan, dChan, shift \
) (minterm + (aChan << 11) + (bChan << 10) + (cChan << 9) + (dChan << 8) + (shift << 12))
#define BLTCON1(descending, shift) ((descending << 1) + (shift << 12))
extern struct Custom far custom;
#define BLITTER_ASCENDING (0)
#define BLITTER_DESCENDING (1)
struct BunClear {
uint16_t memoryStartOffsetBytes;
uint16_t widthWords;
@ -373,7 +366,7 @@ void clearCurrentBuns(
if (!hasBunClear[bunRenderer->activeScreenBufferDetails->currentBuffer]) return;
bltcon0 = 0xc0 + (1 << 8);
bltcon0 = BLTCON0(0xc0, 0, 0, 0, 1, 0);
for (bun = 0; bun < BUN_COUNT; ++bun) {
currentBunClear = &bunClearForScreen[bunRenderer->activeScreenBufferDetails->currentBuffer][bun];

22
main.c
View File

@ -29,6 +29,16 @@
#include "types.h"
#include "bun.h"
/**
* This barely gets 50fps but I'm leaving it for now. Potential improvements:
*
* [ ] Topaz re-rendering is limited to squares or rows that changed in the last frame.
* I tried this once but I need a more precise way of redrawing those areas.
* [ ] Cool bun clears and re-renders happen in the same pass.
* This would likely mean extending the cool bun art to have a blank word on the left,
* and enough blank rows above and below to cover clearing areas above and below.
*/
extern struct Custom far custom;
extern struct CIA far ciaa;
@ -61,20 +71,17 @@ extern uint8_t chip MaskBitplane[];
#define TOPAZ_WIDTH_BYTES (TOPAZ_WIDTH_PIXELS / 8)
#define TOPAZ_WIDTH_WORDS (TOPAZ_WIDTH_PIXELS / 16)
#define BLTSIZE(w, h) (w + (h << 6))
void renderTopaz(void) {
int plane;
uint16_t bltcon0, bltcmod;
uint16_t bltcmod;
uint8_t *bltbpt;
bltcon0 = 0xca + (1 << 8) + (1 << 9) + (1 << 10) + (1 << 11);
bltcmod = screenDefinition.byteWidth - TOPAZ_WIDTH_BYTES;
bltbpt = TopazBitplanes;
for (plane = 0; plane < 3; ++plane) {
custom.bltcon0 = bltcon0;
custom.bltcon0 = BLTCON0(0xca, 1, 1, 1, 1, 0);
custom.bltcon1 = 0;
custom.bltafwm = 0xffff;
custom.bltalwm = 0xffff;
@ -99,15 +106,14 @@ void renderTopaz(void) {
void renderMostlyTopaz(void) {
int plane;
uint16_t bltcon0, bltcmod;
uint16_t bltcmod;
uint8_t *bltbpt;
bltcon0 = 0xca + (1 << 8) + (1 << 9) + (1 << 10) + (1 << 11);
bltcmod = screenDefinition.byteWidth - TOPAZ_WIDTH_BYTES;
bltbpt = TopazBitplanes;
for (plane = 0; plane < 2; ++plane) {
custom.bltcon0 = bltcon0;
custom.bltcon0 = BLTCON0(0xca, 1, 1, 1, 1, 0);
custom.bltcon1 = 0;
custom.bltafwm = 0xffff;
custom.bltalwm = 0xffff;

10
system/blitter.h
View File

@ -1,8 +1,14 @@
#ifndef __BLITTER_H__
#define __BLITTER_H__
#include "types.h"
#include "screen.h"
#define BLTSIZE(w, h) (w + (h << 6))
#define BLTCON0( \
minterm, aChan, bChan, cChan, dChan, shift \
) (minterm + (aChan << 11) + (bChan << 10) + (cChan << 9) + (dChan << 8) + (shift << 12))
#define BLTCON1(descending, shift) ((descending << 1) + (shift << 12))
#define BLITTER_ASCENDING (0)
#define BLITTER_DESCENDING (1)
/*