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mgba-ps3/src/gb/renderers/software.c

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/* Copyright (c) 2013-2016 Jeffrey Pfau
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <mgba/internal/gb/renderers/software.h>
#include <mgba/core/cache-set.h>
#include <mgba/internal/gb/io.h>
#include <mgba/internal/gb/renderers/cache-set.h>
#include <mgba-util/math.h>
#include <mgba-util/memory.h>
static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer);
static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer);
static void GBVideoSoftwareRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable);
static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy);
static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y);
static void _clearScreen(struct GBVideoSoftwareRenderer* renderer) {
size_t sgbOffset = 0;
if (renderer->model & GB_MODEL_SGB) {
return;
}
int y;
for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS; ++y) {
color_t* row = &renderer->outputBuffer[renderer->outputBufferStride * y + sgbOffset];
int x;
for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; x += 4) {
row[x + 0] = renderer->palette[0];
row[x + 1] = renderer->palette[0];
row[x + 2] = renderer->palette[0];
row[x + 3] = renderer->palette[0];
}
}
}
static void _regenerateSGBBorder(struct GBVideoSoftwareRenderer* renderer) {
int i;
for (i = 0; i < 0x40; ++i) {
uint16_t color;
LOAD_16LE(color, 0x800 + i * 2, renderer->d.sgbMapRam);
renderer->d.writePalette(&renderer->d, i + 0x40, color);
}
int x, y;
for (y = 0; y < 224; ++y) {
for (x = 0; x < 256; x += 8) {
if (x >= 48 && x < 208 && y >= 40 && y < 184) {
continue;
}
uint16_t mapData;
LOAD_16LE(mapData, (x >> 2) + (y & ~7) * 8, renderer->d.sgbMapRam);
if (UNLIKELY(SGBBgAttributesGetTile(mapData) >= 0x100)) {
continue;
}
int localY = y & 0x7;
if (SGBBgAttributesIsYFlip(mapData)) {
localY = 7 - localY;
}
uint8_t tileData[4];
tileData[0] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x00];
tileData[1] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x01];
tileData[2] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x10];
tileData[3] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x11];
size_t base = y * renderer->outputBufferStride + x;
int paletteBase = SGBBgAttributesGetPalette(mapData) * 0x10;
int colorSelector;
int flip = 0;
if (SGBBgAttributesIsXFlip(mapData)) {
flip = 7;
}
for (i = 7; i >= 0; --i) {
colorSelector = (tileData[0] >> i & 0x1) << 0 | (tileData[1] >> i & 0x1) << 1 | (tileData[2] >> i & 0x1) << 2 | (tileData[3] >> i & 0x1) << 3;
renderer->outputBuffer[(base + 7 - i) ^ flip] = renderer->palette[paletteBase | colorSelector];
}
}
}
}
static inline void _setAttribute(uint8_t* sgbAttributes, unsigned x, unsigned y, int palette) {
int p = sgbAttributes[(x >> 2) + 5 * y];
p &= ~(3 << (2 * (3 - (x & 3))));
p |= palette << (2 * (3 - (x & 3)));
sgbAttributes[(x >> 2) + 5 * y] = p;
}
static void _parseAttrBlock(struct GBVideoSoftwareRenderer* renderer, int start) {
uint8_t block[6];
memcpy(block, &renderer->sgbPacket[start], 6);
unsigned x0 = block[2];
unsigned x1 = block[4];
unsigned y0 = block[3];
unsigned y1 = block[5];
unsigned x, y;
int pIn = block[1] & 3;
int pPerim = (block[1] >> 2) & 3;
int pOut = (block[1] >> 4) & 3;
for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
if (y > y0 && y < y1 && x > x0 && x < x1) {
if (block[0] & 1) {
_setAttribute(renderer->d.sgbAttributes, x, y, pIn);
}
} else if (y < y0 || y > y1 || x < x0 || x > x1) {
if (block[0] & 4) {
_setAttribute(renderer->d.sgbAttributes, x, y, pOut);
}
} else {
if (block[0] & 2) {
_setAttribute(renderer->d.sgbAttributes, x, y, pPerim);
} else if (block[0] & 1) {
_setAttribute(renderer->d.sgbAttributes, x, y, pIn);
} else if (block[0] & 4) {
_setAttribute(renderer->d.sgbAttributes, x, y, pOut);
}
}
}
}
}
static void _parseAttrLine(struct GBVideoSoftwareRenderer* renderer, int start) {
uint8_t byte = renderer->sgbPacket[start];
unsigned line = byte & 0x1F;
int pal = (byte >> 5) & 3;
if (byte & 0x80) {
if (line > GB_VIDEO_VERTICAL_PIXELS / 8) {
return;
}
int x;
for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
_setAttribute(renderer->d.sgbAttributes, x, line, pal);
}
} else {
if (line > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
return;
}
int y;
for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
_setAttribute(renderer->d.sgbAttributes, line, y, pal);
}
}
}
static bool _inWindow(struct GBVideoSoftwareRenderer* renderer) {
return GBRegisterLCDCIsWindow(renderer->lcdc) && GB_VIDEO_HORIZONTAL_PIXELS + 7 > renderer->wx;
}
void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
renderer->d.init = GBVideoSoftwareRendererInit;
renderer->d.deinit = GBVideoSoftwareRendererDeinit;
renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
renderer->d.writeSGBPacket = GBVideoSoftwareRendererWriteSGBPacket;
renderer->d.writePalette = GBVideoSoftwareRendererWritePalette;
renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
renderer->d.writeOAM = GBVideoSoftwareRendererWriteOAM;
renderer->d.drawRange = GBVideoSoftwareRendererDrawRange;
renderer->d.finishScanline = GBVideoSoftwareRendererFinishScanline;
renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
renderer->d.enableSGBBorder = GBVideoSoftwareRendererEnableSGBBorder;
renderer->d.getPixels = GBVideoSoftwareRendererGetPixels;
renderer->d.putPixels = GBVideoSoftwareRendererPutPixels;
renderer->d.disableBG = false;
renderer->d.disableOBJ = false;
renderer->d.disableWIN = false;
renderer->temporaryBuffer = 0;
}
static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool sgbBorders) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
softwareRenderer->lcdc = 0;
softwareRenderer->scy = 0;
softwareRenderer->scx = 0;
softwareRenderer->wy = 0;
softwareRenderer->currentWy = 0;
softwareRenderer->currentWx = 0;
softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
softwareRenderer->lastX = 0;
softwareRenderer->hasWindow = false;
softwareRenderer->wx = 0;
softwareRenderer->model = model;
softwareRenderer->sgbTransfer = 0;
softwareRenderer->sgbCommandHeader = 0;
softwareRenderer->sgbBorders = sgbBorders;
softwareRenderer->objOffsetX = 0;
softwareRenderer->objOffsetY = 0;
softwareRenderer->offsetScx = 0;
softwareRenderer->offsetScy = 0;
softwareRenderer->offsetWx = 0;
softwareRenderer->offsetWy = 0;
int i;
for (i = 0; i < 64; ++i) {
softwareRenderer->lookup[i] = i;
softwareRenderer->lookup[i] = i;
softwareRenderer->lookup[i] = i;
softwareRenderer->lookup[i] = i;
}
}
static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
UNUSED(softwareRenderer);
}
static void GBVideoSoftwareRendererUpdateWindow(struct GBVideoSoftwareRenderer* renderer, bool before, bool after, uint8_t oldWy) {
if (renderer->lastY >= GB_VIDEO_VERTICAL_PIXELS || !(after || before)) {
return;
}
if (!renderer->hasWindow && renderer->lastX == GB_VIDEO_HORIZONTAL_PIXELS) {
return;
}
if (renderer->lastY >= oldWy) {
if (!after) {
renderer->currentWy -= renderer->lastY;
renderer->hasWindow = true;
} else if (!before) {
if (!renderer->hasWindow) {
renderer->currentWy = renderer->lastY - renderer->wy;
if (renderer->lastY >= renderer->wy && renderer->lastX > renderer->wx) {
++renderer->currentWy;
}
} else {
renderer->currentWy += renderer->lastY;
}
} else if (renderer->wy != oldWy) {
renderer->currentWy += oldWy - renderer->wy;
renderer->hasWindow = true;
}
}
}
static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
if (renderer->cache) {
GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
}
bool wasWindow = _inWindow(softwareRenderer);
uint8_t wy = softwareRenderer->wy;
switch (address) {
case REG_LCDC:
softwareRenderer->lcdc = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
break;
case REG_SCY:
softwareRenderer->scy = value;
break;
case REG_SCX:
softwareRenderer->scx = value;
break;
case REG_WY:
softwareRenderer->wy = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
break;
case REG_WX:
softwareRenderer->wx = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
break;
case REG_BGP:
softwareRenderer->lookup[0] = value & 3;
softwareRenderer->lookup[1] = (value >> 2) & 3;
softwareRenderer->lookup[2] = (value >> 4) & 3;
softwareRenderer->lookup[3] = (value >> 6) & 3;
break;
case REG_OBP0:
softwareRenderer->lookup[0x20 + 0] = value & 3;
softwareRenderer->lookup[0x20 + 1] = (value >> 2) & 3;
softwareRenderer->lookup[0x20 + 2] = (value >> 4) & 3;
softwareRenderer->lookup[0x20 + 3] = (value >> 6) & 3;
break;
case REG_OBP1:
softwareRenderer->lookup[0x24 + 0] = value & 3;
softwareRenderer->lookup[0x24 + 1] = (value >> 2) & 3;
softwareRenderer->lookup[0x24 + 2] = (value >> 4) & 3;
softwareRenderer->lookup[0x24 + 3] = (value >> 6) & 3;
break;
}
return value;
}
static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
memcpy(softwareRenderer->sgbPacket, data, sizeof(softwareRenderer->sgbPacket));
int i;
softwareRenderer->sgbCommandHeader = data[0];
softwareRenderer->sgbTransfer = 0;
int set;
int sets;
int attrX;
int attrY;
int attrDirection;
int pBefore;
int pAfter;
int pDiv;
switch (softwareRenderer->sgbCommandHeader >> 3) {
case SGB_PAL_SET:
softwareRenderer->sgbPacket[1] = data[9];
if (!(data[9] & 0x80)) {
break;
}
// Fall through
case SGB_ATTR_SET:
set = softwareRenderer->sgbPacket[1] & 0x3F;
if (set <= 0x2C) {
memcpy(renderer->sgbAttributes, &renderer->sgbAttributeFiles[set * 90], 90);
}
break;
case SGB_ATTR_BLK:
sets = softwareRenderer->sgbPacket[1];
i = 2;
for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; i += 6, --sets) {
_parseAttrBlock(softwareRenderer, i);
}
break;
case SGB_ATTR_LIN:
sets = softwareRenderer->sgbPacket[1];
i = 2;
for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i, --sets) {
_parseAttrLine(softwareRenderer, i);
}
break;
case SGB_ATTR_DIV:
pAfter = softwareRenderer->sgbPacket[1] & 3;
pBefore = (softwareRenderer->sgbPacket[1] >> 2) & 3;
pDiv = (softwareRenderer->sgbPacket[1] >> 4) & 3;
attrX = softwareRenderer->sgbPacket[2];
if (softwareRenderer->sgbPacket[1] & 0x40) {
if (attrX > GB_VIDEO_VERTICAL_PIXELS / 8) {
attrX = GB_VIDEO_VERTICAL_PIXELS / 8;
}
int j;
for (j = 0; j < attrX; ++j) {
for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, i, j, pBefore);
}
}
if (attrX < GB_VIDEO_VERTICAL_PIXELS / 8) {
for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, i, attrX, pDiv);
}
}
for (; j < GB_VIDEO_VERTICAL_PIXELS / 8; ++j) {
for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, i, j, pAfter);
}
}
} else {
if (attrX > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
attrX = GB_VIDEO_HORIZONTAL_PIXELS / 8;
}
int j;
for (j = 0; j < attrX; ++j) {
for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, j, i, pBefore);
}
}
if (attrX < GB_VIDEO_HORIZONTAL_PIXELS / 8) {
for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, attrX, i, pDiv);
}
}
for (; j < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++j) {
for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
_setAttribute(renderer->sgbAttributes, j, i, pAfter);
}
}
}
break;
case SGB_ATTR_CHR:
attrX = softwareRenderer->sgbPacket[1];
attrY = softwareRenderer->sgbPacket[2];
if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
attrX = 0;
}
if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
attrY = 0;
}
sets = softwareRenderer->sgbPacket[3];
sets |= softwareRenderer->sgbPacket[4] << 8;
attrDirection = softwareRenderer->sgbPacket[5];
i = 6;
for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i) {
int j;
for (j = 0; j < 4 && sets; ++j, --sets) {
uint8_t p = softwareRenderer->sgbPacket[i] >> (6 - j * 2);
_setAttribute(renderer->sgbAttributes, attrX, attrY, p & 3);
if (attrDirection) {
++attrY;
if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
attrY = 0;
++attrX;
}
if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
attrX = 0;
}
} else {
++attrX;
if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
attrX = 0;
++attrY;
}
if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
attrY = 0;
}
}
}
}
break;
case SGB_ATRC_EN:
case SGB_MASK_EN:
if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
_regenerateSGBBorder(softwareRenderer);
}
}
}
static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
color_t color = mColorFrom555(value);
if (softwareRenderer->model & GB_MODEL_SGB) {
if (index < 0x10 && index && !(index & 3)) {
color = softwareRenderer->palette[0];
} else if (index >= 0x40 && !(index & 0xF)) {
color = softwareRenderer->palette[0];
}
}
if (renderer->cache) {
mCacheSetWritePalette(renderer->cache, index, color);
}
if (softwareRenderer->model == GB_MODEL_AGB) {
unsigned r = M_R5(value);
unsigned g = M_G5(value);
unsigned b = M_B5(value);
r = r * r;
g = g * g;
b = b * b;
#ifdef COLOR_16_BIT
r /= 31;
g /= 31;
b /= 31;
color = mColorFrom555(r | (g << 5) | (b << 10));
#else
r >>= 2;
g >>= 2;
b >>= 2;
color = r | (g << 8) | (b << 16);
#endif
}
softwareRenderer->palette[index] = color;
if (softwareRenderer->model & GB_MODEL_SGB && !index && GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
renderer->writePalette(renderer, 0x04, value);
renderer->writePalette(renderer, 0x08, value);
renderer->writePalette(renderer, 0x0C, value);
renderer->writePalette(renderer, 0x40, value);
renderer->writePalette(renderer, 0x50, value);
renderer->writePalette(renderer, 0x60, value);
renderer->writePalette(renderer, 0x70, value);
if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
_regenerateSGBBorder(softwareRenderer);
}
}
}
static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
if (renderer->cache) {
mCacheSetWriteVRAM(renderer->cache, address);
}
}
static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
UNUSED(renderer);
UNUSED(oam);
// Nothing to do
}
static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
softwareRenderer->lastY = y;
softwareRenderer->lastX = endX;
uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
maps += GB_SIZE_MAP;
}
if (softwareRenderer->d.disableBG) {
memset(&softwareRenderer->row[startX], 0, endX - startX);
}
if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
int wy = softwareRenderer->wy + softwareRenderer->currentWy;
int wx = softwareRenderer->wx + softwareRenderer->currentWx - 7;
if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy == y && wx <= endX) {
softwareRenderer->hasWindow = true;
}
if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->hasWindow && wx <= endX) {
if (wx > 0 && !softwareRenderer->d.disableBG) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, wx, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
}
maps = &softwareRenderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
maps += GB_SIZE_MAP;
}
if (!softwareRenderer->d.disableWIN) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, wx, endX, -wx - softwareRenderer->offsetWx, y - wy - softwareRenderer->offsetWy);
}
} else if (!softwareRenderer->d.disableBG) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
}
} else if (!softwareRenderer->d.disableBG) {
memset(&softwareRenderer->row[startX], 0, endX - startX);
}
if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
size_t i;
for (i = 0; i < oamMax; ++i) {
GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
}
}
size_t sgbOffset = 0;
if (softwareRenderer->model & GB_MODEL_SGB && softwareRenderer->sgbBorders) {
sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
}
color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
int x = startX;
int p = 0;
switch (softwareRenderer->d.sgbRenderMode) {
case 0:
if (softwareRenderer->model & GB_MODEL_SGB) {
p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
p >>= 6 - ((x / 4) & 0x6);
p &= 3;
p <<= 2;
}
for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
}
for (; x + 7 < (endX & ~7); x += 8) {
if (softwareRenderer->model & GB_MODEL_SGB) {
p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
p >>= 6 - ((x / 4) & 0x6);
p &= 3;
p <<= 2;
}
row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
}
if (softwareRenderer->model & GB_MODEL_SGB) {
p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
p >>= 6 - ((x / 4) & 0x6);
p &= 3;
p <<= 2;
}
for (; x < endX; ++x) {
row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
}
break;
case 1:
break;
case 2:
for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
row[x] = 0;
}
for (; x + 7 < (endX & ~7); x += 8) {
row[x] = 0;
row[x + 1] = 0;
row[x + 2] = 0;
row[x + 3] = 0;
row[x + 4] = 0;
row[x + 5] = 0;
row[x + 6] = 0;
row[x + 7] = 0;
}
for (; x < endX; ++x) {
row[x] = 0;
}
break;
case 3:
for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
row[x] = softwareRenderer->palette[0];
}
for (; x + 7 < (endX & ~7); x += 8) {
row[x] = softwareRenderer->palette[0];
row[x + 1] = softwareRenderer->palette[0];
row[x + 2] = softwareRenderer->palette[0];
row[x + 3] = softwareRenderer->palette[0];
row[x + 4] = softwareRenderer->palette[0];
row[x + 5] = softwareRenderer->palette[0];
row[x + 6] = softwareRenderer->palette[0];
row[x + 7] = softwareRenderer->palette[0];
}
for (; x < endX; ++x) {
row[x] = softwareRenderer->palette[0];
}
break;
}
}
static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
softwareRenderer->lastX = 0;
softwareRenderer->currentWx = 0;
if (softwareRenderer->sgbTransfer == 1) {
size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
if (offset >= 0x1000) {
return;
}
uint8_t* buffer = NULL;
switch (softwareRenderer->sgbCommandHeader >> 3) {
case SGB_PAL_TRN:
buffer = renderer->sgbPalRam;
break;
case SGB_CHR_TRN:
buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
break;
case SGB_PCT_TRN:
buffer = renderer->sgbMapRam;
break;
case SGB_ATTR_TRN:
buffer = renderer->sgbAttributeFiles;
break;
default:
break;
}
if (buffer) {
int i;
for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
break;
}
uint8_t hi = 0;
uint8_t lo = 0;
hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
buffer[offset + (i << 1) + 0] = lo;
buffer[offset + (i << 1) + 1] = hi;
}
}
}
}
static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
if (softwareRenderer->temporaryBuffer) {
mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
softwareRenderer->temporaryBuffer = 0;
}
if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
_clearScreen(softwareRenderer);
}
if (softwareRenderer->model & GB_MODEL_SGB) {
switch (softwareRenderer->sgbCommandHeader >> 3) {
case SGB_PAL_SET:
case SGB_ATTR_SET:
if (softwareRenderer->sgbPacket[1] & 0x40) {
renderer->sgbRenderMode = 0;
}
break;
case SGB_PAL_TRN:
case SGB_CHR_TRN:
case SGB_PCT_TRN:
if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
// Make sure every buffer sees this if we're multibuffering
_regenerateSGBBorder(softwareRenderer);
}
// Fall through
case SGB_ATTR_TRN:
++softwareRenderer->sgbTransfer;
if (softwareRenderer->sgbTransfer == 5) {
softwareRenderer->sgbCommandHeader = 0;
}
break;
default:
break;
}
}
softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
softwareRenderer->lastX = 0;
softwareRenderer->currentWy = 0;
softwareRenderer->currentWx = 0;
softwareRenderer->hasWindow = false;
}
static void GBVideoSoftwareRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
if (softwareRenderer->model & GB_MODEL_SGB) {
if (enable == softwareRenderer->sgbBorders) {
return;
}
softwareRenderer->sgbBorders = enable;
if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
_regenerateSGBBorder(softwareRenderer);
}
}
}
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
uint8_t* data = renderer->d.vram;
uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
data += 0x1000;
}
int topY = ((sy >> 3) & 0x1F) * 0x20;
int bottomY = sy & 7;
if (startX < 0) {
startX = 0;
}
int x;
if ((startX + sx) & 7) {
int startX2 = startX + 8 - ((startX + sx) & 7);
for (x = startX; x < startX2; ++x) {
uint8_t* localData = data;
int localY = bottomY;
int topX = ((x + sx) >> 3) & 0x1F;
int bottomX = 7 - ((x + sx) & 7);
int bgTile;
if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
bgTile = maps[topX + topY];
} else {
bgTile = ((int8_t*) maps)[topX + topY];
}
int p = 0;
if (renderer->model >= GB_MODEL_CGB) {
GBObjAttributes attrs = attr[topX + topY];
p = GBObjAttributesGetCGBPalette(attrs) * 4;
if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
p |= 0x80;
}
if (GBObjAttributesIsBank(attrs)) {
localData += GB_SIZE_VRAM_BANK0;
}
if (GBObjAttributesIsYFlip(attrs)) {
localY = 7 - bottomY;
}
if (GBObjAttributesIsXFlip(attrs)) {
bottomX = 7 - bottomX;
}
}
uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
tileDataUpper >>= bottomX;
tileDataLower >>= bottomX;
renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
startX = startX2;
}
for (x = startX; x < endX; x += 8) {
uint8_t* localData = data;
int localY = bottomY;
int topX = ((x + sx) >> 3) & 0x1F;
int bgTile;
if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
bgTile = maps[topX + topY];
} else {
bgTile = ((int8_t*) maps)[topX + topY];
}
int p = 0;
if (renderer->model >= GB_MODEL_CGB) {
GBObjAttributes attrs = attr[topX + topY];
p = GBObjAttributesGetCGBPalette(attrs) * 4;
if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
p |= 0x80;
}
if (GBObjAttributesIsBank(attrs)) {
localData += GB_SIZE_VRAM_BANK0;
}
if (GBObjAttributesIsYFlip(attrs)) {
localY = 7 - bottomY;
}
if (GBObjAttributesIsXFlip(attrs)) {
uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
continue;
}
}
uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
}
}
static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
int objX = obj->x + renderer->objOffsetX;
int ix = objX - 8;
if (endX < ix || startX >= ix + 8) {
return;
}
if (objX < endX) {
endX = objX;
}
if (objX - 8 > startX) {
startX = objX - 8;
}
if (startX < 0) {
startX = 0;
}
uint8_t* data = renderer->d.vram;
int tileOffset = 0;
int bottomY;
int objY = obj->y + renderer->objOffsetY;
if (GBObjAttributesIsYFlip(obj->attr)) {
bottomY = 7 - ((y - objY - 16) & 7);
if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY < -8) {
++tileOffset;
}
} else {
bottomY = (y - objY - 16) & 7;
if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY >= -8) {
++tileOffset;
}
}
if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
--tileOffset;
}
uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
int p;
if (renderer->model >= GB_MODEL_CGB) {
p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
if (GBObjAttributesIsBank(obj->attr)) {
data += GB_SIZE_VRAM_BANK0;
}
if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
mask = 0x60;
mask2 = 0x83;
}
} else {
p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
}
int bottomX;
int x = startX;
if ((x - objX) & 7) {
for (; x < endX; ++x) {
if (GBObjAttributesIsXFlip(obj->attr)) {
bottomX = (x - objX) & 7;
} else {
bottomX = 7 - ((x - objX) & 7);
}
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
tileDataUpper >>= bottomX;
tileDataLower >>= bottomX;
color_t current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
}
} else if (GBObjAttributesIsXFlip(obj->attr)) {
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
color_t current;
current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
current = renderer->row[x + 1];
if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
}
current = renderer->row[x + 2];
if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
}
current = renderer->row[x + 3];
if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
}
current = renderer->row[x + 4];
if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
}
current = renderer->row[x + 5];
if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
}
current = renderer->row[x + 6];
if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
}
current = renderer->row[x + 7];
if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
}
} else {
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
color_t current;
current = renderer->row[x + 7];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
current = renderer->row[x + 6];
if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
}
current = renderer->row[x + 5];
if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
}
current = renderer->row[x + 4];
if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
}
current = renderer->row[x + 3];
if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
}
current = renderer->row[x + 2];
if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
}
current = renderer->row[x + 1];
if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
}
current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
}
}
}
static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
*stride = softwareRenderer->outputBufferStride;
*pixels = softwareRenderer->outputBuffer;
}
static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
// TODO: Share with GBAVideoSoftwareRendererGetPixels
const color_t* colorPixels = pixels;
unsigned i;
for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
}
}
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