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