mirror of https://github.com/mgba-emu/mgba.git
GBA Video: Threaded proxy renderer first draft
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ddd81b27b4
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/* Copyright (c) 2013-2015 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "thread-proxy.h"
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#include "gba/io.h"
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#include "util/memory.h"
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DEFINE_VECTOR(GBAVideoDirtyQueue, struct GBAVideoDirtyInfo);
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static void GBAVideoThreadProxyRendererInit(struct GBAVideoRenderer* renderer);
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static void GBAVideoThreadProxyRendererReset(struct GBAVideoRenderer* renderer);
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static void GBAVideoThreadProxyRendererDeinit(struct GBAVideoRenderer* renderer);
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static uint16_t GBAVideoThreadProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
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static void GBAVideoThreadProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
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static void GBAVideoThreadProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
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static void GBAVideoThreadProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
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static void GBAVideoThreadProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
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static void GBAVideoThreadProxyRendererFinishFrame(struct GBAVideoRenderer* renderer);
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static void GBAVideoThreadProxyRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, void** pixels);
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static void GBAVideoThreadProxyRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels);
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static THREAD_ENTRY _proxyThread(void* renderer);
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void GBAVideoThreadProxyRendererCreate(struct GBAVideoThreadProxyRenderer* renderer, struct GBAVideoRenderer* backend) {
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renderer->d.init = GBAVideoThreadProxyRendererInit;
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renderer->d.reset = GBAVideoThreadProxyRendererReset;
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renderer->d.deinit = GBAVideoThreadProxyRendererDeinit;
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renderer->d.writeVideoRegister = GBAVideoThreadProxyRendererWriteVideoRegister;
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renderer->d.writeVRAM = GBAVideoThreadProxyRendererWriteVRAM;
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renderer->d.writeOAM = GBAVideoThreadProxyRendererWriteOAM;
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renderer->d.writePalette = GBAVideoThreadProxyRendererWritePalette;
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renderer->d.drawScanline = GBAVideoThreadProxyRendererDrawScanline;
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renderer->d.finishFrame = GBAVideoThreadProxyRendererFinishFrame;
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renderer->d.getPixels = GBAVideoThreadProxyRendererGetPixels;
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renderer->d.putPixels = GBAVideoThreadProxyRendererPutPixels;
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renderer->d.disableBG[0] = false;
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renderer->d.disableBG[1] = false;
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renderer->d.disableBG[2] = false;
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renderer->d.disableBG[3] = false;
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renderer->d.disableOBJ = false;
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renderer->backend = backend;
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}
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void GBAVideoThreadProxyRendererInit(struct GBAVideoRenderer* renderer) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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ConditionInit(&proxyRenderer->fromThreadCond);
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ConditionInit(&proxyRenderer->toThreadCond);
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MutexInit(&proxyRenderer->mutex);
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GBAVideoDirtyQueueInit(&proxyRenderer->dirtyQueue, 1024);
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proxyRenderer->threadState = PROXY_THREAD_STOPPED;
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proxyRenderer->vramProxy = anonymousMemoryMap(SIZE_VRAM);
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proxyRenderer->backend->palette = proxyRenderer->paletteProxy;
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proxyRenderer->backend->vram = proxyRenderer->vramProxy;
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proxyRenderer->backend->oam = &proxyRenderer->oamProxy;
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proxyRenderer->backend->init(proxyRenderer->backend);
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proxyRenderer->vramDirtyBitmap = 0;
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memset(proxyRenderer->oamDirtyBitmap, 0, sizeof(proxyRenderer->oamDirtyBitmap));
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memset(proxyRenderer->paletteDirtyBitmap, 0, sizeof(proxyRenderer->paletteDirtyBitmap));
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memset(proxyRenderer->regDirtyBitmap, 0, sizeof(proxyRenderer->regDirtyBitmap));
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proxyRenderer->threadState = PROXY_THREAD_IDLE;
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ThreadCreate(&proxyRenderer->thread, _proxyThread, proxyRenderer);
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}
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void GBAVideoThreadProxyRendererReset(struct GBAVideoRenderer* renderer) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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MutexLock(&proxyRenderer->mutex);
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while (proxyRenderer->threadState == PROXY_THREAD_BUSY) {
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ConditionWait(&proxyRenderer->fromThreadCond, &proxyRenderer->mutex);
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}
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int i;
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for (i = 0; i < 128; ++i) {
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proxyRenderer->oamProxy.raw[i * 4] = 0x0200;
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proxyRenderer->oamProxy.raw[i * 4 + 1] = 0x0000;
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proxyRenderer->oamProxy.raw[i * 4 + 2] = 0x0000;
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proxyRenderer->oamProxy.raw[i * 4 + 3] = 0x0000;
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}
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proxyRenderer->backend->reset(proxyRenderer->backend);
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MutexUnlock(&proxyRenderer->mutex);
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}
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void GBAVideoThreadProxyRendererDeinit(struct GBAVideoRenderer* renderer) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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bool waiting = false;
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MutexLock(&proxyRenderer->mutex);
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while (proxyRenderer->threadState == PROXY_THREAD_BUSY) {
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ConditionWake(&proxyRenderer->toThreadCond);
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ConditionWait(&proxyRenderer->fromThreadCond, &proxyRenderer->mutex);
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}
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if (proxyRenderer->threadState == PROXY_THREAD_IDLE) {
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proxyRenderer->threadState = PROXY_THREAD_STOPPED;
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ConditionWake(&proxyRenderer->toThreadCond);
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waiting = true;
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}
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MutexUnlock(&proxyRenderer->mutex);
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if (waiting) {
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ThreadJoin(proxyRenderer->thread);
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}
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ConditionDeinit(&proxyRenderer->fromThreadCond);
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ConditionDeinit(&proxyRenderer->toThreadCond);
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MutexDeinit(&proxyRenderer->mutex);
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proxyRenderer->backend->deinit(proxyRenderer->backend);
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mappedMemoryFree(proxyRenderer->vramProxy, SIZE_VRAM);
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}
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uint16_t GBAVideoThreadProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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switch (address) {
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case REG_BG0CNT:
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case REG_BG1CNT:
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case REG_BG2CNT:
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case REG_BG3CNT:
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value &= 0xFFCF;
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break;
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case REG_BG0HOFS:
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case REG_BG0VOFS:
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case REG_BG1HOFS:
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case REG_BG1VOFS:
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case REG_BG2HOFS:
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case REG_BG2VOFS:
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case REG_BG3HOFS:
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case REG_BG3VOFS:
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value &= 0x01FF;
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break;
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}
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if (address > REG_BLDY) {
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return value;
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}
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proxyRenderer->regProxy[address >> 1] = value;
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int bit = 1 << ((address >> 1) & 31);
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int base = address >> 6;
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if (proxyRenderer->regDirtyBitmap[base] & bit) {
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return value;
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}
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proxyRenderer->regDirtyBitmap[base] |= bit;
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struct GBAVideoDirtyInfo dirty = {
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DIRTY_REGISTER,
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address
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};
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*GBAVideoDirtyQueueAppend(&proxyRenderer->dirtyQueue) = dirty;
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return value;
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}
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void GBAVideoThreadProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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int bit = 1 << (address >> 12);
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if (proxyRenderer->vramDirtyBitmap & bit) {
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return;
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}
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proxyRenderer->vramDirtyBitmap |= bit;
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struct GBAVideoDirtyInfo dirty = {
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DIRTY_VRAM,
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address
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};
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*GBAVideoDirtyQueueAppend(&proxyRenderer->dirtyQueue) = dirty;
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}
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void GBAVideoThreadProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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proxyRenderer->paletteProxy[address >> 1] = value;
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int bit = 1 << ((address >> 1) & 31);
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int base = address >> 6;
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if (proxyRenderer->paletteDirtyBitmap[base] & bit) {
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return;
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}
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proxyRenderer->paletteDirtyBitmap[base] |= bit;
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struct GBAVideoDirtyInfo dirty = {
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DIRTY_PALETTE,
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address
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};
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*GBAVideoDirtyQueueAppend(&proxyRenderer->dirtyQueue) = dirty;
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}
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void GBAVideoThreadProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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proxyRenderer->oamProxy.raw[oam] = proxyRenderer->d.oam->raw[oam];
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int bit = 1 << (oam & 31);
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int base = oam >> 5;
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if (proxyRenderer->oamDirtyBitmap[base] & bit) {
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return;
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}
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proxyRenderer->oamDirtyBitmap[base] |= bit;
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struct GBAVideoDirtyInfo dirty = {
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DIRTY_OAM,
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oam
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};
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*GBAVideoDirtyQueueAppend(&proxyRenderer->dirtyQueue) = dirty;
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}
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void GBAVideoThreadProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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MutexLock(&proxyRenderer->mutex);
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while (proxyRenderer->threadState == PROXY_THREAD_BUSY) {
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ConditionWake(&proxyRenderer->toThreadCond);
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ConditionWait(&proxyRenderer->fromThreadCond, &proxyRenderer->mutex);
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}
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proxyRenderer->y = y;
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ConditionWake(&proxyRenderer->toThreadCond);
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while (proxyRenderer->threadState == PROXY_THREAD_IDLE) {
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ConditionWake(&proxyRenderer->toThreadCond);
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ConditionWait(&proxyRenderer->fromThreadCond, &proxyRenderer->mutex);
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}
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MutexUnlock(&proxyRenderer->mutex);
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}
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void GBAVideoThreadProxyRendererFinishFrame(struct GBAVideoRenderer* renderer) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = (struct GBAVideoThreadProxyRenderer*) renderer;
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MutexLock(&proxyRenderer->mutex);
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while (proxyRenderer->threadState == PROXY_THREAD_BUSY) {
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ConditionWake(&proxyRenderer->toThreadCond);
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ConditionWait(&proxyRenderer->fromThreadCond, &proxyRenderer->mutex);
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}
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proxyRenderer->backend->finishFrame(proxyRenderer->backend);
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MutexUnlock(&proxyRenderer->mutex);
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}
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void GBAVideoThreadProxyRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, void** pixels) {
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// TODO
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}
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void GBAVideoThreadProxyRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels) {
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// TODO
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}
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static THREAD_ENTRY _proxyThread(void* renderer) {
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struct GBAVideoThreadProxyRenderer* proxyRenderer = renderer;
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ThreadSetName("Proxy Renderer Thread");
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MutexLock(&proxyRenderer->mutex);
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while (1) {
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ConditionWait(&proxyRenderer->toThreadCond, &proxyRenderer->mutex);
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if (proxyRenderer->threadState == PROXY_THREAD_STOPPED) {
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break;
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}
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proxyRenderer->threadState = PROXY_THREAD_BUSY;
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proxyRenderer->vramDirtyBitmap = 0;
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memset(proxyRenderer->oamDirtyBitmap, 0, sizeof(proxyRenderer->oamDirtyBitmap));
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memset(proxyRenderer->paletteDirtyBitmap, 0, sizeof(proxyRenderer->paletteDirtyBitmap));
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memset(proxyRenderer->regDirtyBitmap, 0, sizeof(proxyRenderer->regDirtyBitmap));
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size_t queueSize = GBAVideoDirtyQueueSize(&proxyRenderer->dirtyQueue);
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struct GBAVideoDirtyInfo* queue = malloc(queueSize * sizeof(struct GBAVideoDirtyInfo));
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memcpy(queue, GBAVideoDirtyQueueGetPointer(&proxyRenderer->dirtyQueue, 0), queueSize * sizeof(struct GBAVideoDirtyInfo));
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GBAVideoDirtyQueueClear(&proxyRenderer->dirtyQueue);
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size_t i;
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for (i = 0; i < queueSize; ++i) {
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switch (queue[i].type) {
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case DIRTY_REGISTER:
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proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, queue[i].address, proxyRenderer->regProxy[queue[i].address >> 1]);
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break;
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case DIRTY_VRAM:
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proxyRenderer->backend->writeVRAM(proxyRenderer->backend, queue[i].address);
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memcpy(&proxyRenderer->vramProxy[(queue[i].address & ~0xFFF) >> 1], &proxyRenderer->d.vram[(queue[i].address & ~0xFFF) >> 1], 0x1000);
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break;
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case DIRTY_PALETTE:
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proxyRenderer->backend->writePalette(proxyRenderer->backend, queue[i].address, proxyRenderer->paletteProxy[queue[i].address >> 1]);
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break;
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case DIRTY_OAM:
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proxyRenderer->backend->writeOAM(proxyRenderer->backend, queue[i].address);
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break;
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}
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}
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free(queue);
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ConditionWake(&proxyRenderer->fromThreadCond);
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ConditionWait(&proxyRenderer->toThreadCond, &proxyRenderer->mutex);
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MutexUnlock(&proxyRenderer->mutex);
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proxyRenderer->backend->drawScanline(proxyRenderer->backend, proxyRenderer->y);
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MutexLock(&proxyRenderer->mutex);
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proxyRenderer->threadState = PROXY_THREAD_IDLE;
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ConditionWake(&proxyRenderer->fromThreadCond);
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}
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MutexUnlock(&proxyRenderer->mutex);
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return 0;
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}
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@ -0,0 +1,59 @@
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/* Copyright (c) 2013-2015 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef VIDEO_THREAD_PROXY_H
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#define VIDEO_THREAD_PROXY_H
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#include "gba/video.h"
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#include "util/threading.h"
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#include "util/vector.h"
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enum GBAVideoDirtyType {
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DIRTY_REGISTER,
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DIRTY_VRAM,
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DIRTY_OAM,
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DIRTY_PALETTE
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};
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enum GBAVideoThreadProxyState {
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PROXY_THREAD_STOPPED = 0,
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PROXY_THREAD_IDLE,
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PROXY_THREAD_BUSY
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};
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struct GBAVideoDirtyInfo {
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enum GBAVideoDirtyType type;
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uint32_t address;
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};
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DECLARE_VECTOR(GBAVideoDirtyQueue, struct GBAVideoDirtyInfo);
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struct GBAVideoThreadProxyRenderer {
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struct GBAVideoRenderer d;
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struct GBAVideoRenderer* backend;
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Thread thread;
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Condition fromThreadCond;
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Condition toThreadCond;
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Mutex mutex;
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enum GBAVideoThreadProxyState threadState;
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struct GBAVideoDirtyQueue dirtyQueue;
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uint32_t vramDirtyBitmap;
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uint32_t oamDirtyBitmap[16];
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uint32_t paletteDirtyBitmap[16];
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uint32_t regDirtyBitmap[2];
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uint16_t* vramProxy;
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union GBAOAM oamProxy;
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uint16_t paletteProxy[512];
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uint16_t regProxy[42];
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int y;
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};
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void GBAVideoThreadProxyRendererCreate(struct GBAVideoThreadProxyRenderer* renderer, struct GBAVideoRenderer* backend);
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#endif
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