1/* Copyright (c) 2013-2016 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "software.h"
  7
  8#include "util/memory.h"
  9
 10static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer);
 11static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer);
 12static void GBVideoSoftwareRendererReset(struct GBVideoRenderer* renderer);
 13static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
 14static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
 15static void GBVideoSoftwareRendererDrawScanline(struct GBVideoRenderer* renderer, int y);
 16static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer);
 17static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, unsigned* stride, const void** pixels);
 18static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, unsigned stride, void* pixels);
 19
 20#ifdef COLOR_16_BIT
 21#ifdef COLOR_5_6_5
 22static const color_t GB_PALETTE[4] = { 0xFFFF, 0x39C7, 0x18C3, 0x0000};
 23#else
 24static const color_t GB_PALETTE[4] = { 0x7FFF, 0x1DE7, 0x0C63, 0x0000};
 25#endif
 26#else
 27static const color_t GB_PALETTE[4] = { 0xFFFFFF, 0x808080, 0x404040, 0x000000};
 28#endif
 29
 30void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
 31	renderer->d.init = GBVideoSoftwareRendererInit;
 32	renderer->d.reset = GBVideoSoftwareRendererReset;
 33	renderer->d.deinit = GBVideoSoftwareRendererDeinit;
 34	renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
 35	renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
 36	renderer->d.drawScanline = GBVideoSoftwareRendererDrawScanline;
 37	renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
 38	renderer->d.getPixels = 0;
 39	renderer->d.putPixels = 0;
 40
 41	renderer->temporaryBuffer = 0;
 42}
 43
 44static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer) {
 45	GBVideoSoftwareRendererReset(renderer);
 46
 47	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 48
 49	int y;
 50	for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS; ++y) {
 51		color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
 52		int x;
 53		for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; ++x) {
 54			row[x] = GB_PALETTE[0];
 55		}
 56	}
 57}
 58
 59static void GBVideoSoftwareRendererReset(struct GBVideoRenderer* renderer) {
 60	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 61	int i;
 62
 63	// TODO
 64}
 65
 66static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
 67	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 68	UNUSED(softwareRenderer);
 69}
 70
 71static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
 72	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 73	// TODO
 74}
 75static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
 76	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 77	// TODO
 78	return value;
 79}
 80
 81static void GBVideoSoftwareRendererDrawScanline(struct GBVideoRenderer* renderer, int y) {
 82	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 83
 84	color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
 85
 86	// TODO
 87	size_t x;
 88#ifdef COLOR_16_BIT
 89#if defined(__ARM_NEON) && !defined(__APPLE__)
 90	_to16Bit(row, softwareRenderer->row, GB_VIDEO_HORIZONTAL_PIXELS);
 91#else
 92	for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; ++x) {
 93		row[x] = softwareRenderer->row[x];
 94	}
 95#endif
 96#else
 97	memcpy(row, softwareRenderer->row, GB_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
 98#endif
 99}
100
101static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
102	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
103
104	if (softwareRenderer->temporaryBuffer) {
105		mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
106		softwareRenderer->temporaryBuffer = 0;
107	}
108}