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GB Video: Add window support

This commit is contained in:
Jeffrey Pfau 2016-01-21 02:21:09 -08:00
parent 950ea997d3
commit c59bfd173d
2 changed files with 33 additions and 13 deletions
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44
src/gb/renderers/software.c
View File

@ -18,7 +18,7 @@ static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer)
static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, unsigned* stride, const void** pixels);
static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, unsigned stride, void* pixels);
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, int y);
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int x, int y, int sx, int sy);
#ifdef COLOR_16_BIT
#ifdef COLOR_5_6_5
@ -63,6 +63,8 @@ static void GBVideoSoftwareRendererReset(struct GBVideoRenderer* renderer) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
softwareRenderer->scy = 0;
softwareRenderer->scx = 0;
softwareRenderer->wy = 0;
softwareRenderer->wx = 0;
}
static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
@ -104,6 +106,12 @@ static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer*
case REG_SCX:
softwareRenderer->scx = value;
break;
case REG_WY:
softwareRenderer->wy = value;
break;
case REG_WX:
softwareRenderer->wx = value;
break;
}
return value;
}
@ -113,7 +121,19 @@ static void GBVideoSoftwareRendererDrawScanline(struct GBVideoRenderer* renderer
color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
GBVideoSoftwareRendererDrawBackground(softwareRenderer, y);
uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
maps += GB_SIZE_MAP;
}
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, 0, y, softwareRenderer->scx, softwareRenderer->scy);
if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc)) {
maps = &softwareRenderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
maps += GB_SIZE_MAP;
}
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, -7, y, softwareRenderer->wx - 7, softwareRenderer->wy);
}
size_t x;
#ifdef COLOR_16_BIT
@ -138,21 +158,19 @@ static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer)
}
}
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, int y) {
uint8_t* maps = &renderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsTileMap(renderer->lcdc)) {
maps += GB_SIZE_MAP;
}
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int x, int y, int sx, int sy) {
uint8_t* data = renderer->d.vram;
if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
data += 0x1000;
}
int x;
int topY = (((y + renderer->scy) >> 3) & 0x1F) * 0x20;
int bottomY = (y + renderer->scy) & 7;
for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; ++x) {
int topX = ((x + renderer->scx) >> 3) & 0x1F;
int bottomX = 7 - ((x + renderer->scx) & 7);
int topY = (((y + sy) >> 3) & 0x1F) * 0x20;
int bottomY = (y + sy) & 7;
if (x < 0) {
x = 0;
}
for (; x < GB_VIDEO_HORIZONTAL_PIXELS; ++x) {
int topX = ((x + sx) >> 3) & 0x1F;
int bottomX = 7 - ((x + sx) & 7);
int bgTile;
if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
bgTile = maps[topX + topY];

2
src/gb/renderers/software.h
View File

@ -31,6 +31,8 @@ struct GBVideoSoftwareRenderer {
uint8_t scy;
uint8_t scx;
uint8_t wy;
uint8_t wx;
GBRegisterLCDC lcdc;
};