1/* Copyright (c) 2013-2015 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 "gba/renderers/software-private.h"
  7
  8#include <mgba/internal/gba/gba.h>
  9
 10#define MODE_2_COORD_OVERFLOW \
 11	localX = x & (sizeAdjusted - 1); \
 12	localY = y & (sizeAdjusted - 1); \
 13
 14#define MODE_2_COORD_NO_OVERFLOW \
 15	if ((x | y) & ~(sizeAdjusted - 1)) { \
 16		continue; \
 17	} \
 18	localX = x; \
 19	localY = y;
 20
 21#define MODE_2_MOSAIC(COORD) \
 22		if (!mosaicWait) { \
 23			COORD \
 24			mapData = screenBase[(localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)]; \
 25			pixelData = charBase[(mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)]; \
 26			\
 27			mosaicWait = mosaicH; \
 28		} else { \
 29			--mosaicWait; \
 30		}
 31
 32#define MODE_2_NO_MOSAIC(COORD) \
 33	COORD \
 34	mapData = screenBase[(localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)]; \
 35	pixelData = charBase[(mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)];
 36
 37#define MODE_2_LOOP(MOSAIC, COORD, BLEND, OBJWIN) \
 38	for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) { \
 39		x += background->dx; \
 40		y += background->dy; \
 41		\
 42		uint32_t current = *pixel; \
 43		MOSAIC(COORD) \
 44		if (pixelData) { \
 45			COMPOSITE_256_ ## OBJWIN (BLEND, 0); \
 46		} \
 47	}
 48
 49#define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \
 50	if (background->overflow) { \
 51		if (mosaicH > 1) { \
 52			MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
 53		} else { \
 54			MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
 55		} \
 56	} else { \
 57		if (mosaicH > 1) { \
 58			MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
 59		} else { \
 60			MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
 61		} \
 62	}
 63
 64void GBAVideoSoftwareRendererDrawBackgroundMode2(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int inY) {
 65	int sizeAdjusted = 0x8000 << background->size;
 66
 67	BACKGROUND_BITMAP_INIT;
 68
 69	uint8_t* screenBase = &((uint8_t*) renderer->d.vram)[background->screenBase];
 70	uint8_t* charBase = &((uint8_t*) renderer->d.vram)[background->charBase];
 71	uint8_t mapData;
 72	uint8_t pixelData = 0;
 73
 74	int outX;
 75	uint32_t* pixel;
 76
 77	if (!objwinSlowPath) {
 78		if (!(flags & FLAG_TARGET_2)) {
 79			DRAW_BACKGROUND_MODE_2(NoBlend, NO_OBJWIN);
 80		} else {
 81			DRAW_BACKGROUND_MODE_2(Blend, NO_OBJWIN);
 82		}
 83	} else {
 84		if (!(flags & FLAG_TARGET_2)) {
 85			DRAW_BACKGROUND_MODE_2(NoBlend, OBJWIN);
 86		} else {
 87			DRAW_BACKGROUND_MODE_2(Blend, OBJWIN);
 88		}
 89	}
 90}
 91
 92void GBAVideoSoftwareRendererDrawBackgroundMode3(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int inY) {
 93	BACKGROUND_BITMAP_INIT;
 94
 95	uint32_t color = renderer->normalPalette[0];
 96
 97	int outX;
 98	uint32_t* pixel;
 99	for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
100		BACKGROUND_BITMAP_ITERATE(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
101
102		if (!mosaicWait) {
103			LOAD_16(color, ((localX >> 8) + (localY >> 8) * VIDEO_HORIZONTAL_PIXELS) << 1, renderer->d.vram);
104#ifndef COLOR_16_BIT
105			unsigned color32;
106			color32 = 0;
107			color32 |= (color << 3) & 0xF8;
108			color32 |= (color << 6) & 0xF800;
109			color32 |= (color << 9) & 0xF80000;
110			color32 |= (color32 >> 5) & 0x070707;
111			color = color32;
112#elif COLOR_5_6_5
113			uint16_t color16 = 0;
114			color16 |= (color & 0x001F) << 11;
115			color16 |= (color & 0x03E0) << 1;
116			color16 |= (color & 0x7C00) >> 10;
117			color = color16;
118#endif
119			mosaicWait = mosaicH;
120		} else {
121			--mosaicWait;
122		}
123
124		uint32_t current = *pixel;
125		if (!objwinSlowPath || (!(current & FLAG_OBJWIN)) != objwinOnly) {
126			unsigned mergedFlags = flags;
127			if (current & FLAG_OBJWIN) {
128				mergedFlags = objwinFlags;
129			}
130			if (!variant) {
131				_compositeBlendObjwin(renderer, pixel, color | mergedFlags, current);
132			} else if (renderer->blendEffect == BLEND_BRIGHTEN) {
133				_compositeBlendObjwin(renderer, pixel, _brighten(color, renderer->bldy) | mergedFlags, current);
134			} else if (renderer->blendEffect == BLEND_DARKEN) {
135				_compositeBlendObjwin(renderer, pixel, _darken(color, renderer->bldy) | mergedFlags, current);
136			}
137		}
138	}
139}
140
141void GBAVideoSoftwareRendererDrawBackgroundMode4(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int inY) {
142	BACKGROUND_BITMAP_INIT;
143
144	uint16_t color = renderer->normalPalette[0];
145	uint32_t offset = 0;
146	if (GBARegisterDISPCNTIsFrameSelect(renderer->dispcnt)) {
147		offset = 0xA000;
148	}
149
150	int outX;
151	uint32_t* pixel;
152	for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
153		BACKGROUND_BITMAP_ITERATE(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
154
155		if (!mosaicWait) {
156			color = ((uint8_t*)renderer->d.vram)[offset + (localX >> 8) + (localY >> 8) * VIDEO_HORIZONTAL_PIXELS];
157
158			mosaicWait = mosaicH;
159		} else {
160			--mosaicWait;
161		}
162
163		uint32_t current = *pixel;
164		if (color && IS_WRITABLE(current)) {
165			if (!objwinSlowPath) {
166				_compositeBlendNoObjwin(renderer, pixel, palette[color] | flags, current);
167			} else if (objwinForceEnable || (!(current & FLAG_OBJWIN)) == objwinOnly) {
168				color_t* currentPalette = (current & FLAG_OBJWIN) ? objwinPalette : palette;
169				unsigned mergedFlags = flags;
170				if (current & FLAG_OBJWIN) {
171					mergedFlags = objwinFlags;
172				}
173				_compositeBlendObjwin(renderer, pixel, currentPalette[color] | mergedFlags, current);
174			}
175		}
176	}
177}
178
179void GBAVideoSoftwareRendererDrawBackgroundMode5(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int inY) {
180	BACKGROUND_BITMAP_INIT;
181
182	uint32_t color = renderer->normalPalette[0];
183	uint32_t offset = 0;
184	if (GBARegisterDISPCNTIsFrameSelect(renderer->dispcnt)) {
185		offset = 0xA000;
186	}
187
188	int outX;
189	uint32_t* pixel;
190	for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
191		BACKGROUND_BITMAP_ITERATE(160, 128);
192
193		if (!mosaicWait) {
194			LOAD_16(color, offset + (localX >> 8) * 2 + (localY >> 8) * 320, renderer->d.vram);
195#ifndef COLOR_16_BIT
196			unsigned color32 = 0;
197			color32 |= (color << 9) & 0xF80000;
198			color32 |= (color << 3) & 0xF8;
199			color32 |= (color << 6) & 0xF800;
200			color32 |= (color32 >> 5) & 0x070707;
201			color = color32;
202#elif COLOR_5_6_5
203			uint16_t color16 = 0;
204			color16 |= (color & 0x001F) << 11;
205			color16 |= (color & 0x03E0) << 1;
206			color16 |= (color & 0x7C00) >> 10;
207			color = color16;
208#endif
209			mosaicWait = mosaicH;
210		} else {
211			--mosaicWait;
212		}
213
214		uint32_t current = *pixel;
215		if (!objwinSlowPath || (!(current & FLAG_OBJWIN)) != objwinOnly) {
216			unsigned mergedFlags = flags;
217			if (current & FLAG_OBJWIN) {
218				mergedFlags = objwinFlags;
219			}
220			if (!variant) {
221				_compositeBlendObjwin(renderer, pixel, color | mergedFlags, current);
222			} else if (renderer->blendEffect == BLEND_BRIGHTEN) {
223				_compositeBlendObjwin(renderer, pixel, _brighten(color, renderer->bldy) | mergedFlags, current);
224			} else if (renderer->blendEffect == BLEND_DARKEN) {
225				_compositeBlendObjwin(renderer, pixel, _darken(color, renderer->bldy) | mergedFlags, current);
226			}
227		}
228	}
229}