more stuff
This commit is contained in:
John Bintz
parent
026b6f6f0d
commit
af744a3469
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@ -0,0 +1,3 @@
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clang
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%h -x c++-header
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-I/otherhome/john/Amiga/Development/NDKs/3.9/Include/include_h
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@ -0,0 +1,226 @@
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#include <stdlib.h>
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#include <hardware/custom.h>
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#include "blitter.h"
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#include "system.h"
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#include "types.h"
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extern struct Custom far custom;
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/**
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* @param setup Data about the line's draw properties are injected into this struct.
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*/
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void blit_calculateLineBlit(
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struct BlitDrawLineSetup *setup,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey
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) {
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uint16_t i;
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setup->sx = sx;
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setup->dx = ex - sx;
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setup->dy = ey - sy;
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if (setup->dx == 0 && setup->dy == 0) return;
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setup->sud = abs(setup->dy) < abs(setup->dx);
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if (!setup->sud) { i = setup->dx; setup->dx = setup->dy; setup->dy = i; }
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setup->sul = setup->dy < 0;
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setup->dy = abs(setup->dy);
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setup->aul = setup->dx < 0;
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setup->dx = abs(setup->dx);
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setup->accumulator = 4 * setup->dy - 2 * setup->dx;
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setup->sign = setup->accumulator < 0;
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}
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void blit_drawSingleLine(
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struct BlitAreaDetails *blitAreaDetails,
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struct BlitDrawLineSetup *setup
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) {
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custom.bltadat = 0x8000;
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custom.bltbdat = setup->linePattern;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltamod = 4 * (setup->dy - setup->dx);
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custom.bltbmod = 4 * setup->dy;
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custom.bltcmod = blitAreaDetails->drawAreaWidth / 8;
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custom.bltdmod = blitAreaDetails->drawAreaWidth / 8;
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custom.bltapt = setup->accumulator;
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custom.bltcpt = setup->target;
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custom.bltdpt = setup->target;
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custom.bltcon0 = ((setup->sx % 16) << 12) + (11 << 8) + 0xca;
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custom.bltcon1 = 1 + (setup->aul << 2) + (setup->sul << 3) + (setup->sud << 4) + (setup->sign << 6);
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custom.bltsize = 0x02 + ((setup->dx + 1) << 6);
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}
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void blit_fillAreaDetailsFromScreenSetup(
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struct ScreenSetup *screenSetup,
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struct BlitAreaDetails *blitAreaDetails
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) {
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blitAreaDetails->target = screenSetup->memoryStart;
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blitAreaDetails->drawAreaWidth = screenSetup->width;
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blitAreaDetails->nextBitplaneAdvance = screenSetup->nextBitplaneAdvance;
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blitAreaDetails->contiguousBitplanes = screenSetup->bitplanes;
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}
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void blit_drawLine(
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struct BlitAreaDetails *blitAreaDetails,
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struct BlitDrawLineSetup *setup,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey,
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uint8_t color
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) {
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int i;
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blit_calculateLineBlit(setup, sx, sy, ex, ey);
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setup->target = blitAreaDetails->target + WORD_ALIGNED_BYTE_POSITION(blitAreaDetails->drawAreaWidth, sx, sy);
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for (i = 0; i < blitAreaDetails->contiguousBitplanes; ++i) {
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setup->linePattern = ((color & 1) == 1) ? 0xffff : 0;
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blit_drawSingleLine(blitAreaDetails, setup);
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setup->target += blitAreaDetails->nextBitplaneAdvance;
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color >>= 1;
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WaitBlit();
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}
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}
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void blit_copyOneToOne(
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struct BlitAreaDetails *source,
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struct BlitAreaDetails *target,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey,
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uint16_t tx,
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uint16_t ty
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) {
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uint16_t dx = ex - sx;
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uint16_t dy = ey - sy;
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// 23 = 2
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// 24 = 3
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// 0-15 has to equal 2
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// 16-31 has to equal 4
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//
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// 23 = ((23 / 8) & fffe) + 2 =
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uint16_t aModulo = (source->drawAreaWidth / 8) - (((dx + 16) >> 3) & 0xfffe);
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uint16_t dModulo = (target->drawAreaWidth / 8) - (((dx + 16) >> 3) & 0xfffe);
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uint8_t shiftA = sx % 16;
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unsigned char *aPointer = source->target + WORD_ALIGNED_BYTE_POSITION(source->drawAreaWidth, sx, sy);
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unsigned char *dPointer = target->target + WORD_ALIGNED_BYTE_POSITION(target->drawAreaWidth, tx, ty);
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custom.bltcon0 = (1 << 11) + (1 << 8) + 0xca;
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custom.bltcon1 = (1 << 1);
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//custom.bltapt = aPointer;
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//custom.bltdpt = dPointer;
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custom.bltapt = aPointer + WORD_ALIGNED_BYTE_POSITION(source->drawAreaWidth, dx, dy);
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custom.bltdpt = dPointer + WORD_ALIGNED_BYTE_POSITION(target->drawAreaWidth, dx, dy);
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custom.bltamod = aModulo;
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custom.bltdmod = dModulo;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = (dx / 16) + 1 + (dy << 6);
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}
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void blit_howDoesFWMandLWMWork(
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struct BlitAreaDetails *target
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) {
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// data in a
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// setting fwm and lwm to mask that
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// dma enabled for only D
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custom.bltcon0 = 0xF0 + (1 << 8);
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custom.bltcon1 = 0;
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custom.bltadat = 0xffff;
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custom.bltafwm = 0x0ff0;
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custom.bltalwm = 0xf0f0;
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custom.bltdpt = target->target;
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custom.bltamod = 0;
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custom.bltbmod = 0;
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custom.bltsize = (2) + (1 << 6);
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}
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// TODO: blit_drawRectangle
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void blit_clearScreen(struct ScreenSetup *screenSetup, int color) {
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unsigned char *target = screenSetup->memoryStart;
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int i;
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// a is source
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// b is mask
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// c is background
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// d is destination
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// so I want AB+`AC
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custom.bltcon0 = (0x01 << 8) + 0xf0;
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custom.bltcon1 = 0;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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for (i = 0; i < screenSetup->bitplanes; ++i) {
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custom.bltadat = color & 1 == 1 ? 0xffff : 0;
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custom.bltdpt = target + (320 * 256 / 8) * i;
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custom.bltsize = (256 << 7) + (320 / 8);
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myWaitBlit();
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color >>= 1;
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}
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}
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void blit_fillPolygon(
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struct ScreenSetup *screenSetup,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey,
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uint8_t color
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) {
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// use a standard copy blit
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// set bltadat to 0xffff
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// set bltdpt to the top left corner of the zone
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// width is dx / 8
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// height is dy
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// enable descending mode
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// enable inclusive fill for now
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uint16_t dx = ex - sx;
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uint16_t dy = ey - sy;
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unsigned char *source = screenSetup->memoryStart + ((((ey * screenSetup->width + ex) >> 3) - 2) & 0xfffe);
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unsigned char *target = screenSetup->memoryStart + (((((ey + 100) * screenSetup->width + ex) >> 3) - 2) & 0xfffe);
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custom.bltcon0 = (1 << 11) + (1 << 8) + 0xF0; // we don't want to copy anything so we only enable target
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custom.bltcon1 = (1 << 1) + (1 << 3);
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custom.bltapt = source;
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custom.bltdpt = target;
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custom.bltamod = ((screenSetup->width - dx) >> 3) + 1;
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custom.bltdmod = ((screenSetup->width - dx) >> 3) + 1;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = (dx / 16) + (dy << 6);
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}
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@ -0,0 +1,62 @@
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#ifndef __BLITTER_H__
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#define __BLITTER_H__
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#include "types.h"
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#include "screen.h"
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#define WORD_ALIGNED_BYTE_POSITION(width, x, y) (((width * y + x) >> 3) & 0xfffe)
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struct BlitAreaDetails {
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unsigned char *target;
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uint16_t drawAreaWidth;
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uint16_t nextBitplaneAdvance;
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uint8_t contiguousBitplanes;
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};
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struct BlitDrawLineSetup {
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uint16_t linePattern;
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unsigned char *target;
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int dx, dy, sx;
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int sud, sul, aul, accumulator, sign;
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};
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void blit_fillAreaDetailsFromScreenSetup(
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struct ScreenSetup *screenSetup,
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struct BlitAreaDetails *blitAreaDetails
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);
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void blit_calculateLineBlit(
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struct BlitDrawLineSetup *setup,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey
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);
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void blit_drawLine(
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struct BlitAreaDetails *blitAreaDetails,
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struct BlitDrawLineSetup *setup,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey,
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uint8_t color
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);
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void blit_copyOneToOne(
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struct BlitAreaDetails *source,
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struct BlitAreaDetails *target,
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uint16_t sx,
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uint16_t sy,
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uint16_t ex,
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uint16_t ey,
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uint16_t tx,
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uint16_t ty
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);
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void blit_howDoesFWMandLWMWork(
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struct BlitAreaDetails *target
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);
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#endif
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@ -0,0 +1,27 @@
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#include "copper.h"
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#include "system.h"
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#include <clib/exec_protos.h>
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#include <exec/memory.h>
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#include <hardware/custom.h>
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extern struct Custom far custom;
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uint16_t * prepareNewCopperlist(void) {
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uint16_t *copperlist = AllocMem(
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COPPERLIST_SIZE,
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MEMF_CHIP | MEMF_CLEAR
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);
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initializeCopperlist(copperlist);
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return copperlist;
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}
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void setCopperlist(uint16_t *copperlist) {
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custom.cop1lc = copperlist;
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}
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void freeCopperlist(uint16_t *copperlist) {
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FreeMem(copperlist, COPPERLIST_SIZE);
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}
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#ifndef __COPPER_H__
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#define __COPPER_H__
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#define COPPERLIST_SIZE (10000)
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#include "types.h"
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uint16_t * prepareNewCopperlist(void);
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void setCopperlist(uint16_t *copperlist);
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void freeCopperlist(uint16_t *copperlist);
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#endif
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313
main.c
313
main.c
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@ -7,285 +7,108 @@
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#include <hardware/custom.h>
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#include <hardware/dmabits.h>
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#include "blitter.h"
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#include "copper.h"
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#include "screen.h"
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#include "types.h"
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#include "system.h"
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extern struct Custom far custom;
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struct ScreenSetup {
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short int width;
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short int height;
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short int bitplanes;
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unsigned char *memoryStart;
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};
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typedef UWORD color_t;
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extern void TakeOverSystem(void);
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extern void GiveBackSystem(void);
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extern void InitializeCopperlist(void *);
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extern void SetUpDisplay(struct ScreenSetup *);
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extern UWORD* AddDisplayToCopperlist(UWORD *copperlist, struct ScreenSetup *);
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extern UWORD* AddColorsToCopperlist(UWORD *copperlist, color_t[], int count);
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extern UWORD* EndCopperlist(UWORD *copperlist);
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#define SCREEN_WIDTH (320)
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#define SCREEN_HEIGHT (256)
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#define TOTAL_SCREEN_SETUP_SIZE(s) ((s->width / 8) * s->height * s->bitplanes)
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void AllocateScreenMemory(struct ScreenSetup *screenSetup) {
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char *memory = (char *)AllocMem(
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TOTAL_SCREEN_SETUP_SIZE(screenSetup),
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MEMF_CLEAR | MEMF_CHIP
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);
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screenSetup->memoryStart = memory;
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}
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void FreeScreenMemory(struct ScreenSetup *screenSetup) {
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FreeMem(
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screenSetup->memoryStart,
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TOTAL_SCREEN_SETUP_SIZE(screenSetup)
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);
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}
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#define COPPERLIST_SIZE (10000)
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UWORD * PrepareNewCopperlist(void) {
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UWORD *copperlist = AllocMem(
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COPPERLIST_SIZE,
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MEMF_CHIP | MEMF_CLEAR
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);
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InitializeCopperlist(copperlist);
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return copperlist;
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}
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void SetCopperlist(UWORD *copperlist) {
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custom.cop1lc = (ULONG)copperlist;
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}
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void FreeCopperlist(UWORD *copperlist) {
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FreeMem(copperlist, COPPERLIST_SIZE);
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}
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void WriteSomethingToScreen(struct ScreenSetup *screenSetup) {
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void writeSomethingToScreen(struct ScreenSetup *screenSetup) {
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*(screenSetup->memoryStart) = 255;
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*(screenSetup->memoryStart + 8) = 0xAA;
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*(screenSetup->memoryStart + 16) = 0xF0;
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*(screenSetup->memoryStart + SCREEN_WIDTH * SCREEN_HEIGHT / 8 + 4) = 255;
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}
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void BlitFirstPlaneFirstRowToSecondRow(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 2 / 8);
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// copy a to d
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// $09F0
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custom.bltcon0 = 0x09f0;
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custom.bltcon1 = 0;
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custom.bltapt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitShiftFirstPlaneFirstRowToThirdRow(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 4 / 8);
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custom.bltcon0 = 0x49f0;
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custom.bltcon1 = 0;
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custom.bltapt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitWithMaskInBChannel(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 6 / 8);
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unsigned char *mask = (screenSetup->memoryStart + 8);
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// a is source
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// b is mask
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// d is destination
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// so I want AB
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custom.bltcon0 = 0x0dc0;
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custom.bltcon1 = 0;
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custom.bltapt = mask;
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custom.bltbpt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitWithMaskInBDataInCChannel(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 8 / 8);
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unsigned char *mask = (screenSetup->memoryStart + 8);
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unsigned char *background = (screenSetup->memoryStart + 16);
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// a is source
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// b is mask
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// c is background
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// d is destination
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// so I want AB+`AC
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custom.bltcon0 = 0x0fca;
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custom.bltcon1 = 0;
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custom.bltapt = mask;
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custom.bltbpt = source;
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custom.bltcpt = background;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltbmod = 0;
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||||
custom.bltcmod = SCREEN_WIDTH / 8;
|
||||
custom.bltdmod = SCREEN_WIDTH / 8;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x0041;
|
||||
}
|
||||
|
||||
void BlitDrawHorizontalLine(struct ScreenSetup *screenSetup) {
|
||||
|
||||
// i want to draw a line from 20,20 to 50,80
|
||||
// i need to get dx and dy
|
||||
// dx is 30, dy is 60
|
||||
// the shift value is 20 mod 15 = 5
|
||||
// a data register gets $8000
|
||||
// b data register gets $ffff
|
||||
// text shift is 0
|
||||
// c and d pointers get the word containing the first pixel, so
|
||||
// screenSetup->memoryStart + 320 * 20 / 8 + 2
|
||||
// module registers get width of bitplane in bytes
|
||||
// blit height is dx + 1 so 31
|
||||
// blit width = 2
|
||||
// logic is ab+'a, so 6, 7, 2, 3, 1, 0
|
||||
|
||||
char *target = screenSetup->memoryStart + (320 * 20 + 20) / 8;
|
||||
int dx = 10;
|
||||
int dy = 60;
|
||||
int tmp;
|
||||
|
||||
if (dx < dy) {
|
||||
tmp = dx;
|
||||
dx = dy;
|
||||
dy = tmp;
|
||||
}
|
||||
|
||||
custom.bltcon0 = (5 << 12) + (11 << 8) + 0xca;
|
||||
custom.bltcon1 = 1;
|
||||
custom.bltapt = 4 * dy - 2 * dx;
|
||||
custom.bltadat = 0x8000;
|
||||
custom.bltbdat = 0xffff;
|
||||
custom.bltcpt = target;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 4 * (dy - dx);
|
||||
custom.bltbmod = 4 * dy;
|
||||
custom.bltcmod = 320 / 8;
|
||||
custom.bltdmod = 320 / 8;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x02 + (dx + 1 << 7);
|
||||
}
|
||||
|
||||
void BlitClearScreen(struct ScreenSetup *screenSetup, int color) {
|
||||
unsigned char *target = screenSetup->memoryStart;
|
||||
int i;
|
||||
|
||||
// a is source
|
||||
// b is mask
|
||||
// c is background
|
||||
// d is destination
|
||||
|
||||
// so I want AB+`AC
|
||||
|
||||
for (i = 0; i < screenSetup->bitplanes; ++i) {
|
||||
custom.bltcon0 = (0x01 << 8) + 0xf0;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltadat = color & 1 == 1 ? 0xffff : 0;
|
||||
custom.bltdpt = target + (320 * 256 / 8) * i;
|
||||
custom.bltamod = 0;
|
||||
custom.bltdmod = 0;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = (256 << 7) + (320 / 8);
|
||||
|
||||
color >>= 1;
|
||||
WaitBlit();
|
||||
}
|
||||
}
|
||||
|
||||
int main(void) {
|
||||
struct ScreenSetup screenSetup = { SCREEN_WIDTH, SCREEN_HEIGHT, 4, 0 };
|
||||
struct ScreenSetup *s = &screenSetup;
|
||||
UWORD *copperlist, *currentCopperlist;
|
||||
struct ScreenSetup screenSetup;
|
||||
uint16_t *copperlist, *currentCopperlist;
|
||||
int i, result;
|
||||
color_t colors[16];
|
||||
|
||||
struct BlitDrawLineSetup setup;
|
||||
struct BlitAreaDetails blitAreaDetails, sourceBlitCopyDetails;
|
||||
|
||||
unsigned char *polygonScratchArea;
|
||||
|
||||
colors[0] = 0x0200;
|
||||
colors[1] = 0x0f00;
|
||||
colors[2] = 0x0f0f;
|
||||
colors[3] = 0x000f;
|
||||
|
||||
SetUpDisplay(&screenSetup);
|
||||
prepareScreen(&screenSetup, SCREEN_WIDTH, SCREEN_HEIGHT, 4);
|
||||
allocateScreenMemory(&screenSetup);
|
||||
|
||||
AllocateScreenMemory(&screenSetup);
|
||||
WriteSomethingToScreen(&screenSetup);
|
||||
blit_fillAreaDetailsFromScreenSetup(
|
||||
&screenSetup,
|
||||
&blitAreaDetails
|
||||
);
|
||||
|
||||
blit_fillAreaDetailsFromScreenSetup(
|
||||
&screenSetup,
|
||||
&sourceBlitCopyDetails
|
||||
);
|
||||
|
||||
polygonScratchArea = AllocMem(SCREEN_WIDTH * SCREEN_HEIGHT / 8, MEMF_CHIP | MEMF_CLEAR);
|
||||
|
||||
// blitter copy the first bitplane row down to the second
|
||||
|
||||
copperlist = PrepareNewCopperlist();
|
||||
copperlist = prepareNewCopperlist();
|
||||
|
||||
TakeOverSystem();
|
||||
takeOverSystem();
|
||||
|
||||
setCopperlist(copperlist);
|
||||
setUpDisplay(&screenSetup);
|
||||
|
||||
currentCopperlist = addDisplayToCopperlist(copperlist, &screenSetup);
|
||||
currentCopperlist = addColorsToCopperlist(currentCopperlist, colors, 16);
|
||||
endCopperlist(currentCopperlist);
|
||||
|
||||
// blit a line to the scratch area
|
||||
// blit the scratch area over
|
||||
|
||||
/*
|
||||
BlitFirstPlaneFirstRowToSecondRow(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitShiftFirstPlaneFirstRowToThirdRow(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitWithMaskInBChannel(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitWithMaskInBDataInCChannel(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitDrawHorizontalLine(&screenSetup);
|
||||
blit_drawLine(&blitAreaDetails, &setup, 0, 0, 0, 40, 1);
|
||||
blit_drawLine(&blitAreaDetails, &setup, 1, 0, 1, 40, 3);
|
||||
blit_drawLine(&blitAreaDetails, &setup, 15, 0, 15, 40, 3);
|
||||
*/
|
||||
//blit_drawLine(&blitAreaDetails, &setup, 16, 10, 16, 40, 3);
|
||||
//blit_drawLine(&blitAreaDetails, &setup, 50, 10, 50, 40, 1);
|
||||
//blit_drawLine(&blitAreaDetails, &setup, 79, 80, 79, 120, 3);
|
||||
|
||||
blit_howDoesFWMandLWMWork(&blitAreaDetails);
|
||||
|
||||
WaitBlit();
|
||||
|
||||
/*
|
||||
|
||||
|
||||
blit_copyOneToOne(
|
||||
&blitAreaDetails,
|
||||
&blitAreaDetails,
|
||||
1, 0, 24, 16, 80, 80
|
||||
);
|
||||
*/
|
||||
|
||||
BlitClearScreen(&screenSetup, 2);
|
||||
WaitBlit();
|
||||
|
||||
SetCopperlist(copperlist);
|
||||
|
||||
SetUpDisplay(&screenSetup);
|
||||
|
||||
currentCopperlist = AddDisplayToCopperlist(copperlist, &screenSetup);
|
||||
currentCopperlist = AddColorsToCopperlist(currentCopperlist, colors, 16);
|
||||
EndCopperlist(currentCopperlist);
|
||||
|
||||
for (i = 0; i < 100; ++i) {
|
||||
for (i = 0; i < 200; ++i) {
|
||||
WaitTOF();
|
||||
}
|
||||
|
||||
GiveBackSystem();
|
||||
giveBackSystem();
|
||||
|
||||
FreeScreenMemory(&screenSetup);
|
||||
freeScreenMemory(&screenSetup);
|
||||
|
||||
FreeCopperlist(copperlist);
|
||||
freeCopperlist(copperlist);
|
||||
FreeMem(polygonScratchArea, SCREEN_WIDTH * SCREEN_HEIGHT / 8);
|
||||
|
||||
printf("Hello from C\n");
|
||||
|
||||
printf("%d %d\n", setup.dx, setup.dy);
|
||||
printf("%d %d %d\n", setup.sud, setup.sul, setup.aul);
|
||||
|
||||
printf("%d %d\n", setup.accumulator, setup.sign);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,124 @@
|
|||
void BlitFirstPlaneFirstRowToSecondRow(struct ScreenSetup *screenSetup) {
|
||||
unsigned char *source = screenSetup->memoryStart;
|
||||
unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 2 / 8);
|
||||
|
||||
custom.bltcon0 = 0x09f0;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltapt = source;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 0;
|
||||
custom.bltdmod = 0;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x0041;
|
||||
}
|
||||
|
||||
void BlitShiftFirstPlaneFirstRowToThirdRow(struct ScreenSetup *screenSetup) {
|
||||
unsigned char *source = screenSetup->memoryStart;
|
||||
unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 4 / 8);
|
||||
|
||||
custom.bltcon0 = 0x49f0;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltapt = source;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 0;
|
||||
custom.bltdmod = 0;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x0041;
|
||||
}
|
||||
|
||||
void BlitWithMaskInBChannel(struct ScreenSetup *screenSetup) {
|
||||
unsigned char *source = screenSetup->memoryStart;
|
||||
unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 6 / 8);
|
||||
unsigned char *mask = (screenSetup->memoryStart + 8);
|
||||
|
||||
// a is source
|
||||
// b is mask
|
||||
// d is destination
|
||||
|
||||
// so I want AB
|
||||
|
||||
custom.bltcon0 = 0x0dc0;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltapt = mask;
|
||||
custom.bltbpt = source;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 0;
|
||||
custom.bltdmod = 0;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x0041;
|
||||
}
|
||||
|
||||
void BlitWithMaskInBDataInCChannel(struct ScreenSetup *screenSetup) {
|
||||
unsigned char *source = screenSetup->memoryStart;
|
||||
unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 8 / 8);
|
||||
unsigned char *mask = (screenSetup->memoryStart + 8);
|
||||
unsigned char *background = (screenSetup->memoryStart + 16);
|
||||
|
||||
// a is source
|
||||
// b is mask
|
||||
// c is background
|
||||
// d is destination
|
||||
|
||||
// so I want AB+`AC
|
||||
|
||||
custom.bltcon0 = 0x0fca;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltapt = mask;
|
||||
custom.bltbpt = source;
|
||||
custom.bltcpt = background;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 0;
|
||||
custom.bltbmod = 0;
|
||||
custom.bltcmod = SCREEN_WIDTH / 8;
|
||||
custom.bltdmod = SCREEN_WIDTH / 8;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x0041;
|
||||
}
|
||||
|
||||
void BlitDrawHorizontalLine(struct ScreenSetup *screenSetup) {
|
||||
|
||||
// i want to draw a line from 20,20 to 50,80
|
||||
// i need to get dx and dy
|
||||
// dx is 30, dy is 60
|
||||
// the shift value is 20 mod 15 = 5
|
||||
// a data register gets $8000
|
||||
// b data register gets $ffff
|
||||
// text shift is 0
|
||||
// c and d pointers get the word containing the first pixel, so
|
||||
// screenSetup->memoryStart + 320 * 20 / 8 + 2
|
||||
// module registers get width of bitplane in bytes
|
||||
// blit height is dx + 1 so 31
|
||||
// blit width = 2
|
||||
// logic is ab+'a, so 6, 7, 2, 3, 1, 0
|
||||
|
||||
char *target = screenSetup->memoryStart + (320 * 20 + 20) / 8;
|
||||
int dx = 10;
|
||||
int dy = 60;
|
||||
int tmp;
|
||||
|
||||
if (dx < dy) {
|
||||
tmp = dx;
|
||||
dx = dy;
|
||||
dy = tmp;
|
||||
}
|
||||
|
||||
custom.bltcon0 = (5 << 12) + (11 << 8) + 0xca;
|
||||
custom.bltcon1 = 1;
|
||||
custom.bltapt = 4 * dy - 2 * dx;
|
||||
custom.bltadat = 0x8000;
|
||||
custom.bltbdat = 0xffff;
|
||||
custom.bltcpt = target;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 4 * (dy - dx);
|
||||
custom.bltbmod = 4 * dy;
|
||||
custom.bltcmod = 320 / 8;
|
||||
custom.bltdmod = 320 / 8;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x02 + (dx + 1 << 7);
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
#include "screen.h"
|
||||
#include "types.h"
|
||||
|
||||
#include <clib/exec_protos.h>
|
||||
#include <exec/memory.h>
|
||||
|
||||
void allocateScreenMemory(struct ScreenSetup *screenSetup) {
|
||||
char *memory = (char *)AllocMem(
|
||||
TOTAL_SCREEN_SETUP_SIZE(screenSetup),
|
||||
MEMF_CLEAR | MEMF_CHIP
|
||||
);
|
||||
|
||||
screenSetup->memoryStart = memory;
|
||||
}
|
||||
|
||||
void freeScreenMemory(struct ScreenSetup *screenSetup) {
|
||||
FreeMem(
|
||||
screenSetup->memoryStart,
|
||||
TOTAL_SCREEN_SETUP_SIZE(screenSetup)
|
||||
);
|
||||
}
|
||||
|
||||
void prepareScreen(
|
||||
struct ScreenSetup *screenSetup,
|
||||
uint16_t width,
|
||||
uint16_t height,
|
||||
uint8_t bitplanes
|
||||
) {
|
||||
screenSetup->width = width;
|
||||
screenSetup->height = height;
|
||||
screenSetup->bitplanes = bitplanes;
|
||||
screenSetup->nextBitplaneAdvance = width * height / 8;
|
||||
}
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
#ifndef __SCREEN_H__
|
||||
#define __SCREEN_H__
|
||||
|
||||
#include "types.h"
|
||||
|
||||
struct ScreenSetup {
|
||||
short int width;
|
||||
short int height;
|
||||
short int bitplanes;
|
||||
unsigned char *memoryStart;
|
||||
short int nextBitplaneAdvance;
|
||||
};
|
||||
|
||||
|
||||
#define SCREEN_WIDTH (320)
|
||||
#define SCREEN_HEIGHT (256)
|
||||
|
||||
#define TOTAL_SCREEN_SETUP_SIZE(s) ((s->width / 8) * s->height * s->bitplanes)
|
||||
|
||||
void allocateScreenMemory(struct ScreenSetup *screenSetup);
|
||||
void freeScreenMemory(struct ScreenSetup *screenSetup);
|
||||
void prepareScreen(
|
||||
struct ScreenSetup *screenSetup,
|
||||
uint16_t width,
|
||||
uint16_t height,
|
||||
uint8_t bitplanes
|
||||
);
|
||||
|
||||
#endif
|
||||
|
|
@ -6,5 +6,5 @@ all: main
|
|||
.s.o:
|
||||
genam -l $*.s
|
||||
|
||||
main: main.o blitter.o
|
||||
sc link to main main.o blitter.o
|
||||
main: main.o system.o blitter.o screen.o copper.o
|
||||
sc link to main main.o system.o blitter.o screen.o copper.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,21 @@
|
|||
#ifndef __SYSTEM_H__
|
||||
#define __SYSTEM_H__
|
||||
|
||||
#include "types.h"
|
||||
#include "screen.h"
|
||||
|
||||
// this needs to be kept in sync with the XDEFs in system.s
|
||||
|
||||
// copperlist
|
||||
extern void initializeCopperlist(void *copperlist);
|
||||
extern uint16_t* endCopperlist(uint16_t *copperlist);
|
||||
extern uint16_t* addDisplayToCopperlist(uint16_t *copperlist, struct ScreenSetup *);
|
||||
extern uint16_t* addColorsToCopperlist(uint16_t *copperlist, color_t[], int count);
|
||||
|
||||
extern void takeOverSystem(void);
|
||||
extern void giveBackSystem(void);
|
||||
extern void setUpDisplay(struct ScreenSetup *);
|
||||
|
||||
extern void myWaitBlit(void);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,10 +1,11 @@
|
|||
XDEF _TakeOverSystem
|
||||
XDEF _GiveBackSystem
|
||||
XDEF _InitializeCopperlist
|
||||
XDEF _SetUpDisplay
|
||||
XDEF _AddDisplayToCopperlist
|
||||
XDEF _AddColorsToCopperlist
|
||||
XDEF _EndCopperlist
|
||||
XDEF _takeOverSystem
|
||||
XDEF _giveBackSystem
|
||||
XDEF _initializeCopperlist
|
||||
XDEF _setUpDisplay
|
||||
XDEF _addDisplayToCopperlist
|
||||
XDEF _addColorsToCopperlist
|
||||
XDEF _endCopperlist
|
||||
XDEF _myWaitBlit
|
||||
|
||||
XREF _custom
|
||||
|
||||
|
|
@ -24,7 +25,7 @@ FUNC_CNT SET FUNC_CNT-6
|
|||
INCLUDE "hardware/custom.i"
|
||||
INCLUDE "hardware/dmabits.i"
|
||||
|
||||
; @param 1 Pointer to numm terminated name of library
|
||||
; @param 1 Pointer to null terminated name of library
|
||||
; @param 2 Minimum version of library, 0 for any
|
||||
; @outreg D0 pointer to library in memory
|
||||
OpenLibrary MACRO
|
||||
|
|
@ -59,7 +60,7 @@ RestoreRegister MACRO
|
|||
|
||||
BPLCON0_COLOR EQU $200
|
||||
|
||||
_TakeOverSystem:
|
||||
_takeOverSystem:
|
||||
MOVE.L A6,-(SP)
|
||||
OpenLibrary #GraphicsLibrary,#0
|
||||
MOVE.L D0,GraphicsBase
|
||||
|
|
@ -94,7 +95,7 @@ _TakeOverSystem:
|
|||
MOVE.L (SP)+,A6
|
||||
RTS
|
||||
|
||||
_GiveBackSystem:
|
||||
_giveBackSystem:
|
||||
MOVE.L A6,-(SP)
|
||||
LEA _custom,A0
|
||||
|
||||
|
|
@ -118,7 +119,7 @@ _GiveBackSystem:
|
|||
RTS
|
||||
|
||||
; @stack *copperlist Pointer to copperlist
|
||||
_InitializeCopperlist:
|
||||
_initializeCopperlist:
|
||||
MOVE.L 4(A7),A0
|
||||
MOVE.L #$FFFFFFFE,(A0)
|
||||
|
||||
|
|
@ -126,7 +127,7 @@ _InitializeCopperlist:
|
|||
|
||||
; @stack *copperlist Pointer to copperlist
|
||||
; @stack ScreenSetup Pointer to screensetup struct
|
||||
_AddDisplayToCopperlist:
|
||||
_addDisplayToCopperlist:
|
||||
MOVE.L 4(A7),A0 ; copperlist
|
||||
MOVE.L 8(A7),A1 ; struct
|
||||
|
||||
|
|
@ -154,16 +155,18 @@ _AddDisplayToCopperlist:
|
|||
MULU D2,D3
|
||||
ADD.L A2,D3
|
||||
|
||||
; low
|
||||
; high byte
|
||||
SWAP D3
|
||||
MOVE.W D1,(A0)+
|
||||
MOVE.W D3,(A0)+
|
||||
; high
|
||||
; low byte
|
||||
SWAP D3
|
||||
ADDQ #2,D1
|
||||
MOVE.W D1,(A0)+
|
||||
MOVE.W D3,(A0)+
|
||||
DBRA D0,.continue
|
||||
|
||||
; current copperlist position
|
||||
MOVE.L A0,D0
|
||||
MOVEM.L (SP)+,A2/D2/D3
|
||||
|
||||
|
|
@ -171,8 +174,8 @@ _AddDisplayToCopperlist:
|
|||
|
||||
; @stack *copperlist
|
||||
; @stack *colors
|
||||
; @stach count
|
||||
_AddColorsToCopperlist:
|
||||
; @stack count
|
||||
_addColorsToCopperlist:
|
||||
MOVE.L 4(A7),A0 ; copperlist
|
||||
MOVE.L 8(A7),A1 ; colors
|
||||
MOVE.L 12(A7),D0 ; count
|
||||
|
|
@ -192,7 +195,7 @@ _AddColorsToCopperlist:
|
|||
RTS
|
||||
|
||||
; @stack *copperlist
|
||||
_EndCopperlist:
|
||||
_endCopperlist:
|
||||
MOVE.L 4(A7),A0
|
||||
|
||||
MOVE.W #$ffff,(A0)+
|
||||
|
|
@ -202,7 +205,7 @@ _EndCopperlist:
|
|||
RTS
|
||||
|
||||
; @stack *ScreenSetup
|
||||
_SetUpDisplay:
|
||||
_setUpDisplay:
|
||||
MOVE.L 4(A7),A0
|
||||
|
||||
LEA _custom,A1
|
||||
|
|
@ -226,6 +229,20 @@ _SetUpDisplay:
|
|||
|
||||
RTS
|
||||
|
||||
_myWaitBlit:
|
||||
LEA _custom,A0
|
||||
|
||||
BTST.B #DMAB_BLTDONE-8,dmaconr(A0)
|
||||
BTST.B #DMAB_BLTDONE-8,dmaconr(A0)
|
||||
BEQ .done
|
||||
|
||||
.loop:
|
||||
BTST.B #DMAB_BLTDONE-8,dmaconr(A0)
|
||||
BNE .loop
|
||||
|
||||
.done:
|
||||
RTS
|
||||
|
||||
CNOP 0,4
|
||||
OldView dc.l 0
|
||||
OldCopper dc.l 0
|
||||
Loading…
Reference in New Issue