diff options
Diffstat (limited to 'src/mame/video/gba.c')
-rw-r--r-- | src/mame/video/gba.c | 1901 |
1 files changed, 1901 insertions, 0 deletions
diff --git a/src/mame/video/gba.c b/src/mame/video/gba.c new file mode 100644 index 00000000000..0699f047c98 --- /dev/null +++ b/src/mame/video/gba.c @@ -0,0 +1,1901 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont,Ryan Holtz +/*************************************************************************** + + gba.c + + File to handle emulation of the video hardware of the Game Boy Advance + + By R. Belmont, MooglyGuy + +***************************************************************************/ + +#include "emu.h" +#include "includes/gba.h" + +#define VERBOSE_LEVEL (0) + +INLINE void ATTR_PRINTF(3,4) verboselog(running_machine &machine, int n_level, const char *s_fmt, ...) +{ + if( VERBOSE_LEVEL >= n_level ) + { + va_list v; + char buf[ 32768 ]; + va_start( v, s_fmt ); + vsprintf( buf, s_fmt, v ); + va_end( v ); + logerror( "%08x: %s", machine.driver_data<gba_state>()->m_maincpu->pc(), buf ); + } +} + +static const int coeff[32] = { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16 +}; + +/* Utility functions */ +INLINE UINT32 alpha_blend_pixel(UINT32 color0, UINT32 color1, int ca, int cb); +INLINE UINT32 increase_brightness(UINT32 color, int coeff_); +INLINE UINT32 decrease_brightness(UINT32 color, int coeff_); + +#define GBA_MODE0 0 +#define GBA_MODE1 1 +#define GBA_MODE2 2 +#define GBA_MODE345 3 + +#define GBA_SUBMODE0 0 +#define GBA_SUBMODE1 1 +#define GBA_SUBMODE2 2 + +inline void gba_state::update_mask(UINT8* mask, int mode, int submode, UINT32* obj_win, UINT8 inwin0, UINT8 inwin1, UINT8 in0_mask, UINT8 in1_mask, UINT8 out_mask) +{ + UINT8 mode_mask = 0; + if (submode == GBA_SUBMODE2) + { + for (int x = 0; x < 240; x++) + { + mask[x] = out_mask; + + if ((obj_win[x] & 0x80000000) == 0) + mask[x] = m_WINOUT >> 8; + + if (inwin1) + { + if (is_in_window(x, 1)) + mask[x] = in1_mask; + } + + if (inwin0) + { + if (is_in_window(x, 0)) + mask[x] = in0_mask; + } + } + } + + if (mode == GBA_MODE1) + { + // disable line3 + mode_mask = ~0x08; + } + else if (mode == GBA_MODE2) + { + // disable line0 & line1 + mode_mask = ~0x03; + } + else if (mode == GBA_MODE345) + { + // disable line0, line1 & line3 + mode_mask = ~0x0b; + } + + + if (mode_mask) + { + for (int x = 0; x < 240; x++) + mask[x] &= mode_mask; + } +} + +void gba_state::draw_modes(int mode, int submode, int y, UINT32* line0, UINT32* line1, UINT32* line2, UINT32* line3, UINT32* lineOBJ, UINT32* lineOBJWin, UINT32* lineMix, int bpp) +{ + UINT32 backdrop = ((UINT16*)m_gba_pram.target())[0] | 0x30000000; + int inWindow0 = 0; + int inWindow1 = 0; + UINT8 inWin0Mask = m_WININ & 0x00ff; + UINT8 inWin1Mask = m_WININ >> 8; + UINT8 outMask = m_WINOUT & 0x00ff; + UINT8 masks[240]; // this puts together WinMasks with the fact that some modes/submodes skip specific layers! + + if (submode == GBA_SUBMODE2) + { + if (m_DISPCNT & DISPCNT_WIN0_EN) + { + UINT8 v0 = m_WIN0V >> 8; + UINT8 v1 = m_WIN0V & 0x00ff; + inWindow0 = ((v0 == v1) && (v0 >= 0xe8)) ? 1 : 0; + if (v1 >= v0) + inWindow0 |= (y >= v0 && y < v1) ? 1 : 0; + else + inWindow0 |= (y >= v0 || y < v1) ? 1 : 0; + } + + if (m_DISPCNT & DISPCNT_WIN1_EN) + { + UINT8 v0 = m_WIN1V >> 8; + UINT8 v1 = m_WIN1V & 0x00ff; + inWindow1 = ((v0 == v1) && (v0 >= 0xe8)) ? 1 : 0; + if (v1 >= v0) + inWindow1 |= (y >= v0 && y < v1) ? 1 : 0; + else + inWindow1 |= (y >= v0 || y < v1) ? 1 : 0; + } + } + + // Draw BG + switch (mode) + { + case 0: + draw_bg_scanline(line0, y, DISPCNT_BG0_EN, m_BG0CNT, m_BG0HOFS, m_BG0VOFS); + draw_bg_scanline(line1, y, DISPCNT_BG1_EN, m_BG1CNT, m_BG1HOFS, m_BG1VOFS); + draw_bg_scanline(line2, y, DISPCNT_BG2_EN, m_BG2CNT, m_BG2HOFS, m_BG2VOFS); + draw_bg_scanline(line3, y, DISPCNT_BG3_EN, m_BG3CNT, m_BG3HOFS, m_BG3VOFS); + break; + case 1: + draw_bg_scanline(line0, y, DISPCNT_BG0_EN, m_BG0CNT, m_BG0HOFS, m_BG0VOFS); + draw_bg_scanline(line1, y, DISPCNT_BG1_EN, m_BG1CNT, m_BG1HOFS, m_BG1VOFS); + draw_roz_scanline(line2, y, DISPCNT_BG2_EN, m_BG2CNT, m_BG2X, m_BG2Y, m_BG2PA, m_BG2PB, m_BG2PC, m_BG2PD, &m_gfxBG2X, &m_gfxBG2Y, m_gfxBG2Changed); + break; + case 2: + draw_roz_scanline(line2, y, DISPCNT_BG2_EN, m_BG2CNT, m_BG2X, m_BG2Y, m_BG2PA, m_BG2PB, m_BG2PC, m_BG2PD, &m_gfxBG2X, &m_gfxBG2Y, m_gfxBG2Changed); + draw_roz_scanline(line3, y, DISPCNT_BG3_EN, m_BG3CNT, m_BG3X, m_BG3Y, m_BG3PA, m_BG3PB, m_BG3PC, m_BG3PD, &m_gfxBG3X, &m_gfxBG3Y, m_gfxBG3Changed); + break; + case 3: + case 4: + case 5: + draw_roz_bitmap_scanline(line2, y, DISPCNT_BG2_EN, m_BG2CNT, m_BG2X, m_BG2Y, m_BG2PA, m_BG2PB, m_BG2PC, m_BG2PD, &m_gfxBG2X, &m_gfxBG2Y, m_gfxBG2Changed, bpp); + break; + } + + // Draw OAM + draw_gba_oam(lineOBJ, y); + if (submode == GBA_SUBMODE2) + draw_gba_oam_window(lineOBJWin, y); + + memset(masks, 0xff, sizeof(masks)); + update_mask(&masks[0], mode, submode, lineOBJWin, inWindow0, inWindow1, inWin0Mask, inWin1Mask, outMask); + + for (int x = 0; x < 240; x++) + { + UINT32 color = backdrop; + UINT8 top = 0x20; + + if ((UINT8)(line0[x] >> 24) < (UINT8)(color >> 24) && masks[x] & 0x01) + { + color = line0[x]; + top = 0x01; + } + + if ((UINT8)(line1[x] >> 24) < (UINT8)(color >> 24) && masks[x] & 0x02) + { + color = line1[x]; + top = 0x02; + } + + if ((UINT8)(line2[x] >> 24) < (UINT8)(color >> 24) && masks[x] & 0x04) + { + color = line2[x]; + top = 0x04; + } + + if ((UINT8)(line3[x] >> 24) < (UINT8)(color >> 24) && masks[x] & 0x08) + { + color = line3[x]; + top = 0x08; + } + + if ((UINT8)(lineOBJ[x] >> 24) < (UINT8)(color >> 24) && masks[x] & 0x10) + { + color = lineOBJ[x]; + top = 0x10; + } + + if (color & 0x00010000) + { + if (submode != GBA_SUBMODE0 || top == 0x10) + { + UINT32 back = backdrop; + UINT8 top2 = 0x20; + + if ((UINT8)(line0[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x01) + { + back = line0[x]; + top2 = 0x01; + } + + if ((UINT8)(line1[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x02) + { + back = line1[x]; + top2 = 0x02; + } + + if ((UINT8)(line2[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x04) + { + back = line2[x]; + top2 = 0x04; + } + + if ((UINT8)(line3[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x08) + { + back = line3[x]; + top2 = 0x08; + } + + if (top2 & (m_BLDCNT >> BLDCNT_TP2_SHIFT)) + color = alpha_blend_pixel(color, back, coeff[m_BLDALPHA & 0x1f], coeff[(m_BLDALPHA >> 8) & 0x1f]); + else + { + if (top & m_BLDCNT) + { + switch(m_BLDCNT & BLDCNT_SFX) + { + case BLDCNT_SFX_LIGHTEN: + color = increase_brightness(color, coeff[m_BLDY & 0x1f]); + break; + case BLDCNT_SFX_DARKEN: + color = decrease_brightness(color, coeff[m_BLDY & 0x1f]); + break; + } + } + } + } + } + else if (submode == GBA_SUBMODE1 || (submode == GBA_SUBMODE2 && masks[x] & 0x20)) + { + if (top & m_BLDCNT) + { + switch(m_BLDCNT & BLDCNT_SFX) + { + case BLDCNT_SFX_NONE: + break; + case BLDCNT_SFX_ALPHA: + { + UINT32 back = backdrop; + UINT8 top2 = 0x20; + + if ((UINT8)(line0[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x01) + { + if (top != 0x01) + { + back = line0[x]; + top2 = 0x01; + } + } + + if ((UINT8)(line1[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x02) + { + if (top != 0x02) + { + back = line1[x]; + top2 = 0x02; + } + } + + if ((UINT8)(line2[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x04) + { + if (top != 0x04) + { + back = line2[x]; + top2 = 0x04; + } + } + + if ((UINT8)(line3[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x08) + { + if (top != 0x08) + { + back = line3[x]; + top2 = 0x08; + } + } + + if ((UINT8)(lineOBJ[x] >> 24) < (UINT8)(back >> 24) && masks[x] & 0x10) + { + if (top != 0x10) + { + back = lineOBJ[x]; + top2 = 0x10; + } + } + + if (top2 & (m_BLDCNT >> BLDCNT_TP2_SHIFT)) + color = alpha_blend_pixel(color, back, coeff[m_BLDALPHA & 0x1f], coeff[(m_BLDALPHA >> 8) & 0x1f]); + } + break; + case BLDCNT_SFX_LIGHTEN: + color = increase_brightness(color, coeff[m_BLDY & 0x1f]); + break; + case BLDCNT_SFX_DARKEN: + color = decrease_brightness(color, coeff[m_BLDY & 0x1f]); + break; + } + } + } + lineMix[x] = color; + } + if (mode == GBA_MODE1 || mode == GBA_MODE2 || mode == GBA_MODE345) + m_gfxBG2Changed = 0; + if (mode == GBA_MODE2) + m_gfxBG3Changed = 0; +} + +void gba_state::draw_roz_bitmap_scanline(UINT32 *scanline, int ypos, UINT32 enablemask, UINT32 ctrl, INT32 X, INT32 Y, INT32 PA, INT32 PB, INT32 PC, INT32 PD, INT32 *currentx, INT32 *currenty, int changed, int depth) +{ + UINT8 *src8 = (UINT8 *)m_gba_vram.target(); + UINT16 *src16 = (UINT16 *)m_gba_vram.target(); + UINT16 *palette = (UINT16 *)m_gba_pram.target(); + INT32 sx = (depth == 4) ? 160 : 240; + INT32 sy = (depth == 4) ? 128 : 160; + UINT32 prio = ((ctrl & BGCNT_PRIORITY) << 25) + 0x1000000; + INT32 cx, cy, pixx, pixy, x; + + if ((depth == 8) && (m_DISPCNT & DISPCNT_FRAMESEL)) + src8 += 0xa000; + + if ((depth == 4) && (m_DISPCNT & DISPCNT_FRAMESEL)) + src16 += 0xa000/2; + + // sign extend roz parameters + if (X & 0x08000000) X |= 0xf0000000; + if (Y & 0x08000000) Y |= 0xf0000000; + if (PA & 0x8000) PA |= 0xffff0000; + if (PB & 0x8000) PB |= 0xffff0000; + if (PC & 0x8000) PC |= 0xffff0000; + if (PD & 0x8000) PD |= 0xffff0000; + + if(ypos == 0) + changed = 3; + + if(changed & 1) + *currentx = X; + else + *currentx += PB; + + if(changed & 2) + *currenty = Y; + else + *currenty += PD; + + cx = *currentx; + cy = *currenty; + + if(ctrl & BGCNT_MOSAIC) + { + INT32 mosaic_line = ((m_MOSAIC & 0xf0) >> 4) + 1; + INT32 tempy = (ypos / mosaic_line) * mosaic_line; + cx = X + tempy*PB; + cy = Y + tempy*PD; + } + + pixx = cx >> 8; + pixy = cy >> 8; + + for(x = 0; x < 240; x++) + { + if(pixx < 0 || pixy < 0 || pixx >= sx || pixy >= sy) + { + scanline[x] = 0x80000000; + } + else + { + if (depth == 8) + { + UINT8 color = src8[pixy*sx + pixx]; + scanline[x] = color ? (palette[color] | prio) : 0x80000000; + } + else + { + scanline[x] = src16[pixy*sx + pixx] | prio; + } + } + + cx += PA; + cy += PC; + + pixx = cx >> 8; + pixy = cy >> 8; + } + + if(ctrl & BGCNT_MOSAIC) + { + INT32 mosaicx = (m_MOSAIC & 0x0f) + 1; + if(mosaicx > 1) + { + INT32 m = 1; + for(x = 0; x < 239; x++) + { + scanline[x+1] = scanline[x]; + m++; + if(m == mosaicx) + { + m = 1; + x++; + } + } + } + } +} + +void gba_state::draw_roz_scanline(UINT32 *scanline, int ypos, UINT32 enablemask, UINT32 ctrl, INT32 X, INT32 Y, INT32 PA, INT32 PB, INT32 PC, INT32 PD, INT32 *currentx, INT32 *currenty, int changed) +{ + UINT32 base, mapbase, size; + static const INT32 sizes[4] = { 128, 256, 512, 1024 }; + INT32 cx, cy, pixx, pixy; + UINT8 *mgba_vram = (UINT8 *)m_gba_vram.target(); + UINT32 tile; + UINT16 *pgba_pram = (UINT16 *)m_gba_pram.target(); + UINT16 pixel; + UINT32 prio = ((ctrl & BGCNT_PRIORITY) << 25) + 0x1000000; + int x = 0; + + for (x = 0; x < 240; x++) + scanline[x] = 0x80000000; + + if (m_DISPCNT & enablemask) + { + base = ((ctrl & BGCNT_CHARBASE) >> BGCNT_CHARBASE_SHIFT) * 0x4000; // VRAM base of tiles + mapbase = ((ctrl & BGCNT_SCREENBASE) >> BGCNT_SCREENBASE_SHIFT) * 0x800; // VRAM base of map + size = (ctrl & BGCNT_SCREENSIZE) >> BGCNT_SCREENSIZE_SHIFT; // size of map in submaps + + // sign extend roz parameters + if (X & 0x08000000) X |= 0xf0000000; + if (Y & 0x08000000) Y |= 0xf0000000; + if (PA & 0x8000) PA |= 0xffff0000; + if (PB & 0x8000) PB |= 0xffff0000; + if (PC & 0x8000) PC |= 0xffff0000; + if (PD & 0x8000) PD |= 0xffff0000; + + if(ypos == 0) + changed = 3; + + if(changed & 1) + *currentx = X; + else + *currentx += PB; + + if(changed & 2) + *currenty = Y; + else + *currenty += PD; + + cx = *currentx; + cy = *currenty; + + if(ctrl & BGCNT_MOSAIC) + { + int mosaic_line = ((m_MOSAIC & 0xf0) >> 4) + 1; + int y = ypos % mosaic_line; + cx -= y*PB; + cy -= y*PD; + } + + pixx = cx >> 8; + pixy = cy >> 8; + + if(ctrl & BGCNT_PALETTESET_WRAP) + { + pixx %= sizes[size]; + pixy %= sizes[size]; + if(pixx < 0) + { + pixx += sizes[size]; + } + if(pixy < 0) + { + pixy += sizes[size]; + } + } + + for(x = 0; x < 240; x++) + { + if(pixx < 0 || pixy < 0 || pixx >= sizes[size] || pixy >= sizes[size]) + { + scanline[x] = 0x80000000; + } + else + { + int tilex = pixx & 7; + int tiley = pixy & 7; + + // shall we shift for (ctrl & BGCNT_PALETTE256)?? or is not effective for ROZ? + tile = mgba_vram[mapbase + (pixx >> 3) + (pixy >> 3) * (sizes[size] >> 3)]; + pixel = mgba_vram[base + (tile << 6) + (tiley << 3) + tilex]; + + // plot it + scanline[x] = pixel ? (pgba_pram[pixel] | prio) : 0x80000000; + } + + cx += PA; + cy += PC; + + pixx = cx >> 8; + pixy = cy >> 8; + + if(ctrl & BGCNT_PALETTESET_WRAP) + { + pixx %= sizes[size]; + pixy %= sizes[size]; + if(pixx < 0) + { + pixx += sizes[size]; + } + if(pixy < 0) + { + pixy += sizes[size]; + } + } + } + + if(ctrl & BGCNT_MOSAIC) + { + int mosaicx = (m_MOSAIC & 0x0f) + 1; + if(mosaicx > 1) + { + int m = 1; + for(x = 0; x < 239; x++) + { + scanline[x+1] = scanline[x]; + m++; + if(m == mosaicx) + { + m = 1; + x++; + } + } + } + } + } +} + +void gba_state::draw_bg_scanline(UINT32 *scanline, int ypos, UINT32 enablemask, UINT32 ctrl, UINT32 hofs, UINT32 vofs) +{ + UINT8 *vram = (UINT8*)m_gba_vram.target(); + UINT16 *palette = (UINT16*)m_gba_pram.target(); + UINT8 *chardata = &vram[((ctrl & BGCNT_CHARBASE) >> BGCNT_CHARBASE_SHIFT) * 0x4000]; + UINT16 *screendata = (UINT16*)&vram[((ctrl & BGCNT_SCREENBASE) >> BGCNT_SCREENBASE_SHIFT) * 0x800]; + UINT32 priority = ((ctrl & BGCNT_PRIORITY) << 25) + 0x1000000; + INT32 width = 256; + INT32 height = 256; + INT32 maskx, masky, pixx, pixy; + UINT8 use_mosaic = (ctrl & BGCNT_MOSAIC) ? 1 : 0; + INT32 mosaicx = (m_MOSAIC & 0x000f) + 1; + INT32 mosaicy = ((m_MOSAIC & 0x00f0) >> 4) + 1; + INT32 stride; + int x = 0; + + for (x = 0; x < 240; x++) + scanline[x] = 0x80000000; + + if(m_DISPCNT & enablemask) + { + switch((ctrl & BGCNT_SCREENSIZE) >> BGCNT_SCREENSIZE_SHIFT) + { + case 1: + width = 512; + break; + case 2: + height = 512; + break; + case 3: + width = 512; + height = 512; + break; + } + + maskx = width - 1; + masky = height - 1; + + pixx = hofs & maskx; + pixy = (vofs + ypos) & masky; + + if(use_mosaic) + { + if((ypos % mosaicy) != 0) + { + mosaicy = (ypos / mosaicy) * mosaicy; + pixy = (vofs + mosaicy) & masky; + } + } + + if(pixy > 255 && height > 256) + { + pixy &= 0x000000ff; + screendata += 0x400; + if(width > 256) + { + screendata += 0x400; + } + } + + stride = (pixy >> 3) << 5; + + UINT16 *src = screendata + 0x400 * (pixx >> 8) + ((pixx & 255) >> 3) + stride; + for(x = 0; x < 240; x++) + { + UINT16 data = *src; + INT32 tile = data & TILEOBJ_TILE; + INT32 tilex = pixx & 7; + INT32 tiley = pixy & 7; + UINT8 color; + UINT8 palindex; + + if(data & TILEOBJ_HFLIP) + { + tilex = 7 - tilex; + } + if(data & TILEOBJ_VFLIP) + { + tiley = 7 - tiley; + } + + if (ctrl & BGCNT_PALETTE256) + { + color = chardata[(tile << 6) + (tiley << 3) + tilex]; + palindex = 0; + } + else + { + color = chardata[(tile << 5) + (tiley << 2) + (tilex >> 1)]; + + if (tilex & 1) + color >>= 4; + else + color &= 0x0f; + palindex = (data >> 8) & 0x00f0; + } + + if (color) + scanline[x] = palette[palindex + color] | priority; + else + scanline[x] = 0x80000000; + + if (data & TILEOBJ_HFLIP) + { + if (tilex == 0) + { + src++; + } + } + else if (tilex == 7) + { + src++; + } + + pixx++; + if(pixx == 256) + { + if(width > 256) + { + src = screendata + 0x400 + stride; + } + else + { + src = screendata + stride; + pixx = 0; + } + } + else if(pixx >= width) + { + pixx = 0; + src = screendata + stride; + } + } + + if(use_mosaic) + { + if(mosaicx > 1) + { + INT32 m = 1; + for(x = 0; x < 239; x++) + { + scanline[x+1] = scanline[x]; + m++; + if(m == mosaicx) + { + m = 1; + x++; + } + } + } + } + + } +} + +void gba_state::draw_gba_oam_window(UINT32 *scanline, int y) +{ + INT16 gba_oamindex; + UINT32 tilebytebase, tileindex, tiledrawindex; + UINT32 width, height; + UINT16 *pgba_oam = (UINT16 *)m_gba_oam.target(); + UINT8 *src = (UINT8*)m_gba_vram.target(); + int x = 0; + + for (x = 0; x < 240; x++) + scanline[x] = 0x80000000; + + if (m_DISPCNT & DISPCNT_OBJWIN_EN) + { + for( gba_oamindex = 127; gba_oamindex >= 0; gba_oamindex-- ) + { + INT32 sx, sy; + UINT16 attr0, attr1, attr2; + INT32 cury; + + attr0 = pgba_oam[(4*gba_oamindex)+0]; + attr1 = pgba_oam[(4*gba_oamindex)+1]; + attr2 = pgba_oam[(4*gba_oamindex)+2]; + + sx = (attr1 & OBJ_X_COORD); + sy = (attr0 & OBJ_Y_COORD); + + if(sy > 160) + { + sy -= 256; + } + + if ((attr0 & OBJ_MODE) != OBJ_MODE_WINDOW) + { + continue; + } + else + { + width = 0; + height = 0; + switch (attr0 & OBJ_SHAPE ) + { + case OBJ_SHAPE_SQR: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 1; + height = 1; + break; + case OBJ_SIZE_16: + width = 2; + height = 2; + break; + case OBJ_SIZE_32: + width = 4; + height = 4; + break; + case OBJ_SIZE_64: + width = 8; + height = 8; + break; + } + break; + case OBJ_SHAPE_HORIZ: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 2; + height = 1; + break; + case OBJ_SIZE_16: + width = 4; + height = 1; + break; + case OBJ_SIZE_32: + width = 4; + height = 2; + break; + case OBJ_SIZE_64: + width = 8; + height = 4; + break; + } + break; + case OBJ_SHAPE_VERT: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 1; + height = 2; + break; + case OBJ_SIZE_16: + width = 1; + height = 4; + break; + case OBJ_SIZE_32: + width = 2; + height = 4; + break; + case OBJ_SIZE_64: + width = 4; + height = 8; + break; + } + break; + default: + width = 0; + height = 0; + verboselog(machine(), 0, "OAM error: Trying to draw OBJ with OBJ_SHAPE = 3!\n" ); + break; + } + + tiledrawindex = tileindex = (attr2 & OBJ_TILENUM); + tilebytebase = 0x10000; // the index doesn't change in the higher modes, we just ignore sprites that are out of range + + if (attr0 & OBJ_ROZMODE_ROZ) + { + INT32 fx, fy, ax, ay, rx, ry; + INT16 dx, dy, dmx, dmy; + UINT8 color; + + width *= 8; + height *= 8; + + if ((attr0 & OBJ_ROZMODE) == OBJ_ROZMODE_DISABLE) + { + continue; + } + + fx = width; + fy = height; + + if((attr0 & OBJ_ROZMODE) == OBJ_ROZMODE_DBLROZ) + { + fx *= 2; + fy *= 2; + } + + cury = y - sy; + + if(cury >= 0 && cury < fy) + { + if(sx < 240 || ((sx + fx) & 0x1ff) < 240) + { + int rot = (attr1 & OBJ_SCALE_PARAM) >> OBJ_SCALE_PARAM_SHIFT; + dx = (INT16)pgba_oam[(rot << 4)+3]; + dmx = (INT16)pgba_oam[(rot << 4)+7]; + dy = (INT16)pgba_oam[(rot << 4)+11]; + dmy = (INT16)pgba_oam[(rot << 4)+15]; + + rx = (width << 7) - (fx >> 1)*dx - (fy >> 1)*dmx + cury * dmx; + ry = (height << 7) - (fx >> 1)*dy - (fy >> 1)*dmy + cury * dmy; + + if((attr0 & OBJ_PALMODE) == OBJ_PALMODE_256) + { + int inc = 32; + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = sx >> 2; + } + else + { + tiledrawindex &= 0x3fe; + } + for(x = 0; x < fx; x++) + { + ax = rx >> 8; + ay = ry >> 8; + + if(ax < 0 || ax >= sx || ay < 0 || ay >= sy) + { + } + else + { + color = src[tilebytebase + ((((tiledrawindex + (ay >> 3) * inc) << 5) + ((ay & 0x07) << 3) + ((ax >> 3) << 6) + (ax & 0x07)) & 0x7fff)]; + + if(color) + { + scanline[sx] = 1; + } + } + + sx = (sx + 1) & 0x1ff; + + rx += dx; + ry += dy; + } + } + else + { + int inc = 32; + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = sx >> 3; + } + for(x = 0; x < fx; x++) + { + ax = rx >> 8; + ay = ry >> 8; + + if(ax < 0 || ax >= sx || ay < 0 || ay >= sy) + { + } + else + { + color = src[tilebytebase + ((((tiledrawindex + (ay >> 3) * inc) << 5) + ((ay & 0x07) << 2) + ((ax >> 3) << 5) + ((ax & 0x07) >> 1)) & 0x7fff)]; + + if(ax & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color) + { + scanline[sx] = 1; + } + } + + sx = (sx + 1) & 0x1ff; + + rx += dx; + ry += dy; + } + } + } + } + } + else + { + INT32 ax; + int cury_ = y - sy; + + width *= 8; + height *= 8; + + if(cury_ >= 0 && cury_ < height) + { + if( ( (sx < 240) || ( ( (sx + width) & 0x1ff ) < 240 ) ) && (attr0 & OBJ_ROZMODE_DISABLE) == 0) + { + if((attr0 & OBJ_PALMODE) == OBJ_PALMODE_256) + { + int inc = 32; + int address = 0; + if(attr1 & OBJ_VFLIP) + { + cury_ = height - cury_ - 1; + } + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 2; + } + else + { + tiledrawindex &= 0x3fe; + } + + ax = 0; + if(attr1 & OBJ_HFLIP) + { + ax = width - 1; + } + + address = 0x10000 + ((((tiledrawindex + (cury_ >> 3) * inc) << 5) + ((cury_ & 7) << 3) + ((ax >> 3) << 6) + (ax & 7)) & 0x7fff); + + if(attr1 & OBJ_HFLIP) + { + ax = 7; + } + + for(x = 0; x < width; x++) + { + if(sx < 240) + { + UINT8 color = src[address]; + + if(color) + { + scanline[sx] = 1; + } + } + + sx = (sx + 1) & 0x1ff; + + if(attr1 & OBJ_HFLIP) + { + ax--; + address--; + if(ax == -1) + { + address -= 56; + ax = 7; + } + if(address < 0x10000) + { + address += 0x8000; + } + } + else + { + ax++; + address++; + if(ax == 8) + { + address += 56; + ax = 0; + } + if(address > 0x17fff) + { + address -= 0x8000; + } + } + } + } + else + { + int inc = 32; + UINT32 address; + if(attr1 & OBJ_VFLIP) + { + cury_ = height - cury_ - 1; + } + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 3; + } + + ax = 0; + if(attr1 & OBJ_HFLIP) + { + ax = width - 1; + } + + address = 0x10000 + ((((tiledrawindex + (cury_ >> 3) * inc) << 5) + ((cury_ & 0x07) << 2) + ((ax >> 3) << 5) + ((ax & 0x07) >> 1)) & 0x7fff); + if(attr1 & OBJ_HFLIP) + { + ax = 7; + for(x = width - 1; x >= 0; x--) + { + if(sx < 240) + { + UINT8 color = src[address]; + if(x & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color) + { + scanline[sx] = 1; + } + } + + sx = (sx + 1) & 0x1ff; + ax--; + if((x & 1) == 0) + { + address--; + } + if(ax == -1) + { + ax = 7; + address -= 28; + } + if(address < 0x10000) + { + address += 0x8000; + } + } + } + else + { + for(x = 0; x < width; x++) + { + if(sx < 240) + { + UINT8 color = src[address]; + + if(x & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color) + { + scanline[sx] = 1; + } + } + + sx = (sx + 1) & 0x1ff; + ax++; + if(x & 1) + { + address++; + } + if(ax == 8) + { + address += 28; + ax = 0; + } + if(address > 0x17fff) + { + address -= 0x8000; + } + } + } + } + } + } + } + } + } + } +} + +void gba_state::draw_gba_oam(UINT32 *scanline, int y) +{ + INT16 gba_oamindex; + INT32 mosaiccnt = 0; + INT32 mosaicy = ((m_MOSAIC & 0xf000) >> 12) + 1; + INT32 mosaicx = ((m_MOSAIC & 0x0f00) >> 8) + 1; + UINT32 tileindex, tiledrawindex; //, tilebytebase + UINT8 width, height; + UINT16 *pgba_oam = (UINT16 *)m_gba_oam.target(); + UINT8 *src = (UINT8 *)m_gba_vram.target(); + UINT16 *palette = (UINT16*)m_gba_pram.target(); + int x = 0; + + for (x = 0; x < 240; x++) + scanline[x] = 0x80000000; + + if( m_DISPCNT & DISPCNT_OBJ_EN ) + { + for( gba_oamindex = 0; gba_oamindex < 128; gba_oamindex++ ) + { + UINT16 attr0, attr1, attr2; + INT32 cury; + UINT32 prio; + UINT32 priority; + + attr0 = pgba_oam[(4*gba_oamindex)+0]; + attr1 = pgba_oam[(4*gba_oamindex)+1]; + attr2 = pgba_oam[(4*gba_oamindex)+2]; + priority = (attr2 & OBJ_PRIORITY) >> OBJ_PRIORITY_SHIFT; + prio = (priority << 25) | ((attr0 & OBJ_MODE) << 6); + + if ((attr0 & OBJ_MODE) != OBJ_MODE_WINDOW) + { + width = 0; + height = 0; + switch (attr0 & OBJ_SHAPE) + { + case OBJ_SHAPE_SQR: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 1; + height = 1; + break; + case OBJ_SIZE_16: + width = 2; + height = 2; + break; + case OBJ_SIZE_32: + width = 4; + height = 4; + break; + case OBJ_SIZE_64: + width = 8; + height = 8; + break; + } + break; + case OBJ_SHAPE_HORIZ: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 2; + height = 1; + break; + case OBJ_SIZE_16: + width = 4; + height = 1; + break; + case OBJ_SIZE_32: + width = 4; + height = 2; + break; + case OBJ_SIZE_64: + width = 8; + height = 4; + break; + } + break; + case OBJ_SHAPE_VERT: + switch(attr1 & OBJ_SIZE ) + { + case OBJ_SIZE_8: + width = 1; + height = 2; + break; + case OBJ_SIZE_16: + width = 1; + height = 4; + break; + case OBJ_SIZE_32: + width = 2; + height = 4; + break; + case OBJ_SIZE_64: + width = 4; + height = 8; + break; + } + break; + default: + width = 0; + height = 0; + verboselog(machine(), 0, "OAM error: Trying to draw OBJ with OBJ_SHAPE = 3!\n" ); + break; + } + + tiledrawindex = tileindex = (attr2 & OBJ_TILENUM); +// tilebytebase = 0x10000; // the index doesn't change in the higher modes, we just ignore sprites that are out of range + + if (attr0 & OBJ_ROZMODE_ROZ) + { + INT32 sx, sy; + INT32 fx, fy, rx, ry; + INT16 dx, dy, dmx, dmy; + + width *= 8; + height *= 8; + + if ((attr0 & OBJ_ROZMODE) == OBJ_ROZMODE_DISABLE) + { + continue; + } + + sx = (attr1 & OBJ_X_COORD); + sy = (attr0 & OBJ_Y_COORD); + + if(sy > 160) + { + sy -= 256; + } + + fx = width; + fy = height; + + if((attr0 & OBJ_ROZMODE) == OBJ_ROZMODE_DBLROZ) + { + fx *= 2; + fy *= 2; + } + + cury = y - sy; + + if(cury >= 0 && cury < fy) + { + if(sx < 240 || ((sx + fx) & 0x1ff) < 240) + { + INT32 oamparam = (attr1 & OBJ_SCALE_PARAM) >> OBJ_SCALE_PARAM_SHIFT; + + dx = (INT16)pgba_oam[(oamparam << 4)+3]; + dmx = (INT16)pgba_oam[(oamparam << 4)+7]; + dy = (INT16)pgba_oam[(oamparam << 4)+11]; + dmy = (INT16)pgba_oam[(oamparam << 4)+15]; + + if(attr0 & OBJ_MOSAIC) + { + cury -= (cury % mosaicy); + } + + rx = (width << 7) - (fx >> 1)*dx - (fy >> 1)*dmx + cury*dmx; + ry = (height << 7) - (fx >> 1)*dy - (fy >> 1)*dmy + cury*dmy; + + if((attr0 & OBJ_PALMODE) == OBJ_PALMODE_256) + { + INT32 inc = 32; + + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 2; + } + else + { + tiledrawindex &= 0x3fe; + } + + for(x = 0; x < fx; x++) + { + INT32 pixx = rx >> 8; + INT32 pixy = ry >> 8; + + if(!(pixx < 0 || pixx >= width || pixy < 0 || pixy >= height || sx >= 240)) + { + UINT8 color = src[0x10000 + ((((tiledrawindex + (pixy >> 3) * inc) << 5) + ((pixy & 7) << 3) + ((pixx >> 3) << 6) + (pixx & 7)) & 0x7fff)]; + if(color == 0 && priority < ((scanline[sx] >> 25) & 3)) + { + scanline[sx] = (scanline[sx] & 0xf9ffffff) | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + else if(color != 0 && prio < (scanline[sx] & 0xff000000)) + { + scanline[sx] = palette[256 + color] | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + + if(attr0 & OBJ_MOSAIC) + { + mosaiccnt++; + if(mosaiccnt == mosaicx) + { + mosaiccnt = 0; + } + } + } + + sx++; + sx &= 0x1ff; + + rx += dx; + ry += dy; + } + } + else + { + INT32 inc = 32; + INT32 palentry = (attr2 >> 8) & 0xf0; + + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 3; + } + + for(x = 0; x < fx; x++) + { + INT32 pixx = rx >> 8; + INT32 pixy = ry >> 8; + + if(!(pixx < 0 || pixx >= width || pixy < 0 || pixy >= height || sx >= 240)) + { + UINT8 color = src[0x10000 + ((((tiledrawindex + (pixy >> 3) * inc) << 5) + ((pixy & 7) << 2) + ((pixx >> 3) << 5) + ((pixx & 7) >> 1)) & 0x7fff)]; + + if(pixx & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color == 0 && priority < ((scanline[sx] >> 25) & 3)) + { + scanline[sx] = (scanline[sx] & 0xf9ffffff) | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + else if(color != 0 && prio < (scanline[sx] & 0xff000000)) + { + scanline[sx] = palette[256 + palentry + color] | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + } + + if(attr0 & OBJ_MOSAIC) + { + mosaiccnt++; + if(mosaiccnt == mosaicx) + { + mosaiccnt = 0; + } + } + + sx++; + + sx &= 0x1ff; + + rx += dx; + ry += dy; + } + } + } + } + } + else + { + INT32 sx, sy; + INT32 vflip = (attr1 & OBJ_VFLIP) ? 1 : 0; + INT32 hflip = (attr1 & OBJ_HFLIP) ? 1 : 0; + + width *= 8; + height *= 8; + + if ((attr0 & OBJ_ROZMODE) == OBJ_ROZMODE_DISABLE) + { + continue; + } + + sx = (attr1 & OBJ_X_COORD); + sy = (attr0 & OBJ_Y_COORD); + + if(sy > 160) + { + sy -= 256; + } + + cury = y - sy; + if(cury >= 0 && cury < height) + { + if(sx < 240 || ((sx + width) & 0x1ff) < 240) + { + if((attr0 & OBJ_PALMODE) == OBJ_PALMODE_256) + { + INT32 pixx; + INT32 inc = 32; + INT32 address = 0; + + if(vflip) + { + cury = height - cury - 1; + } + + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 2; + } + else + { + tiledrawindex &= 0x3fe; + } + + pixx = 0; + if(hflip) + { + pixx = width - 1; + } + + if(attr0 & OBJ_MOSAIC) + { + cury -= (cury % mosaicy); + } + + address = 0x10000 + ((((tiledrawindex + (cury >> 3) * inc) << 5) + ((cury & 7) << 3) + ((pixx >> 3) << 6) + (pixx & 7)) & 0x7fff); + + if(hflip) + { + pixx = 7; + } + + for(x = 0; x < width; x++) + { + if(sx < 240) + { + UINT8 color = src[address]; + if(color == 0 && priority < ((scanline[sx] >> 25) & 3)) + { + scanline[sx] = (scanline[sx] & 0xf9ffffff) | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + else if(color != 0 && prio < (scanline[sx] & 0xff000000)) + { + scanline[sx] = palette[256 + color] | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + } + + if(attr0 & OBJ_MOSAIC) + { + mosaiccnt++; + if(mosaiccnt == mosaicx) + { + mosaiccnt = 0; + } + } + + sx++; + sx &= 0x1ff; + + if(hflip) + { + pixx--; + address--; + if(pixx == -1) + { + address -= 56; + pixx = 7; + } + if(address < 0x10000) + { + address += 0x8000; + } + } + else + { + pixx++; + address++; + if(pixx == 8) + { + address += 56; + pixx = 0; + } + if(address > 0x17fff) + { + address -= 0x8000; + } + } + } + } + else + { + INT32 pixx; + INT32 inc = 32; + UINT32 address = 0; + + if(vflip) + { + cury = height - cury - 1; + } + + if((m_DISPCNT & DISPCNT_MODE) > 2 && tiledrawindex < 0x200) + { + continue; + } + + if((m_DISPCNT & DISPCNT_VRAM_MAP) == DISPCNT_VRAM_MAP_1D) + { + inc = width >> 3; + } + + pixx = 0; + if(hflip) + { + pixx = width - 1; + } + + if(attr0 & OBJ_MOSAIC) + { + cury -= (cury % mosaicy); + } + + address = 0x10000 + ((((tiledrawindex + (cury >> 3) * inc) << 5) + ((cury & 7) << 2) + ((pixx >> 3) << 5) + ((pixx & 7) >> 1)) & 0x7fff); + + if(hflip) + { + pixx = 7; + for(x = width - 1; x >= 0; x--) + { + if(sx < 240) + { + UINT8 color = src[address]; + UINT8 palentry = (attr2 >> 8) & 0xf0; + + if(x & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color == 0 && priority < ((scanline[sx] >> 25) & 3)) + { + scanline[sx] = (scanline[sx] & 0xf9ffffff) | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + else if(color != 0 && prio < (scanline[sx] & 0xff000000)) + { + scanline[sx] = palette[256 + palentry + color] | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + } + + sx++; + sx &= 0x1ff; + + pixx--; + if(!(x & 1)) + { + address--; + } + if(pixx == -1) + { + address -= 28; + pixx = 7; + } + if(address < 0x10000) + { + address += 0x8000; + } + } + } + else + { + for(x = 0; x < width; x++) + { + if(sx < 240) + { + UINT8 color = src[address]; + UINT8 palentry = (attr2 >> 8) & 0xf0; + + if(x & 1) + { + color >>= 4; + } + else + { + color &= 0x0f; + } + + if(color == 0 && priority < ((scanline[sx] >> 25) & 3)) + { + scanline[sx] = (scanline[sx] & 0xf9ffffff) | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + else if(color != 0 && prio < (scanline[sx] & 0xff000000)) + { + scanline[sx] = palette[256 + palentry + color] | prio; + if((attr0 & OBJ_MOSAIC) != 0 && mosaiccnt != 0) + { + scanline[sx] = (scanline[sx - 1] & 0xf9ffffff) | prio; + } + } + } + + if(attr0 & OBJ_MOSAIC) + { + mosaiccnt++; + if(mosaiccnt == mosaicx) + { + mosaiccnt = 0; + } + } + + sx++; + sx &= 0x1ff; + + pixx++; + if(x & 1) + { + address++; + } + if(pixx == 8) + { + address += 28; + pixx = 0; + } + if(address > 0x17fff) + { + address -= 0x8000; + } + } + } + } + } + } + } + } + } + } +} + +inline int gba_state::is_in_window(int x, int window) +{ + int x0 = m_WIN0H >> 8; + int x1 = m_WIN0H & 0x00ff; + + if(window == 1) + { + x0 = m_WIN1H >> 8; + x1 = m_WIN1H & 0x00ff; + } + + if(x0 <= x1) + { + if(x >= x0 && x < x1) + { + return 1; + } + } + else + { + if(x >= x0 || x < x1) + { + return 1; + } + } + + return 0; +} + +INLINE UINT32 alpha_blend_pixel(UINT32 color0, UINT32 color1, int ca, int cb) +{ + if(color0 < 0x80000000) + { + int r0 = (color0 >> 0) & 0x1f; + int g0 = (color0 >> 5) & 0x1f; + int b0 = (color0 >> 10) & 0x1f; + int r1 = (color1 >> 0) & 0x1f; + int g1 = (color1 >> 5) & 0x1f; + int b1 = (color1 >> 10) & 0x1f; + int r = ((r0 * ca) >> 4) + ((r1 * cb) >> 4); + int g = ((g0 * ca) >> 4) + ((g1 * cb) >> 4); + int b = ((b0 * ca) >> 4) + ((b1 * cb) >> 4); + + if(r > 0x1f) r = 0x1f; + if(g > 0x1f) g = 0x1f; + if(b > 0x1f) b = 0x1f; + + return (color0 & 0xffff0000) | (b << 10) | (g << 5) | r; + } + return color0; +} + +INLINE UINT32 increase_brightness(UINT32 color, int coeff_) +{ + int r = (color >> 0) & 0x1f; + int g = (color >> 5) & 0x1f; + int b = (color >> 10) & 0x1f; + + r += ((0x1f - r) * coeff_) >> 4; + g += ((0x1f - g) * coeff_) >> 4; + b += ((0x1f - b) * coeff_) >> 4; + + if(r > 0x1f) r = 0x1f; + if(g > 0x1f) g = 0x1f; + if(b > 0x1f) b = 0x1f; + + return (color & 0xffff0000) | (b << 10) | (g << 5) | r; +} + +INLINE UINT32 decrease_brightness(UINT32 color, int coeff_) +{ + int r = (color >> 0) & 0x1f; + int g = (color >> 5) & 0x1f; + int b = (color >> 10) & 0x1f; + + r -= (r * coeff_) >> 4; + g -= (g * coeff_) >> 4; + b -= (b * coeff_) >> 4; + + if(r < 0) r = 0; + if(g < 0) g = 0; + if(b < 0) b = 0; + + return (color & 0xffff0000) | (b << 10) | (g << 5) | r; +} + +void gba_state::draw_scanline(int y) +{ + bitmap_ind16 &bitmap = m_bitmap; + UINT16 *scanline = &bitmap.pix16(y); + UINT8 submode = 0; + int depth = 0; + + // forced blank + if (m_DISPCNT & DISPCNT_BLANK) + { + // forced blank is white + for (int x = 0; x < 240; x++) + scanline[x] = 0x7fff; + return; + } + + if(!m_fxOn && !m_windowOn && !(m_DISPCNT & DISPCNT_OBJWIN_EN)) + submode = GBA_SUBMODE0; + else if(m_fxOn && !m_windowOn && !(m_DISPCNT & DISPCNT_OBJWIN_EN)) + submode = GBA_SUBMODE1; + else + submode = GBA_SUBMODE2; + + if ((m_DISPCNT & 7) == 3) + depth = 16; + else if ((m_DISPCNT & 7) == 4) + depth = 8; + else if ((m_DISPCNT & 7) == 5) + depth = 4; + + //printf("mode = %d, %d\n", m_DISPCNT & 7, submode); + + switch(m_DISPCNT & 7) + { + case 0: + case 1: + case 2: + draw_modes(m_DISPCNT & 7, submode, y, &m_xferscan[0][1024], &m_xferscan[1][1024], &m_xferscan[2][1024], &m_xferscan[3][1024], &m_xferscan[4][1024], &m_xferscan[5][1024], &m_xferscan[6][1024], depth); + break; + case 3: + case 4: + case 5: + draw_modes(GBA_MODE345, submode, y, &m_xferscan[0][1024], &m_xferscan[1][1024], &m_xferscan[2][1024], &m_xferscan[3][1024], &m_xferscan[4][1024], &m_xferscan[5][1024], &m_xferscan[6][1024], depth); + break; + default: + fatalerror("Invalid screen mode (6 or 7)!\n"); + } + + for (int x = 0; x < 240; x++) + { + scanline[x] = m_xferscan[6][1024 + x] & 0x7fff; + } + + return; +} + +void gba_state::video_start() +{ + machine().first_screen()->register_screen_bitmap(m_bitmap); +} + +UINT32 gba_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect); + return 0; +} |