Initial commit

backends/platform/3ds/sprite.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "backends/platform/3ds/osystem.h"
+#include "backends/platform/3ds/sprite.h"
+#include "common/algorithm.h"
+#include "common/util.h"
+
+namespace N3DS {
+
+Sprite::Sprite()
+	: textureTransferFlags(0)
+	, dirtyPixels(true)
+	, dirtyMatrix(true)
+	, actualWidth(0)
+	, actualHeight(0)
+	, posX(0)
+	, posY(0)
+	, offsetX(0)
+	, offsetY(0)
+	, scaleX(1.f)
+	, scaleY(1.f)
+{
+	Mtx_Identity(&modelview);
+
+	vertices = (vertex *)linearAlloc(sizeof(vertex) * 4);
+}
+
+Sprite::~Sprite() {
+	free();
+	linearFree(vertices);
+}
+
+void Sprite::create(uint16 width, uint16 height, const GfxMode3DS *mode, bool vram) {
+	int16 wPow = MAX<uint16>(Common::nextHigher2(width), 64u);
+	int16 hPow = MAX<uint16>(Common::nextHigher2(height), 64u);
+
+	bool pwrW_hChanged = (wPow != w) || (hPow != h);
+	bool sfcBppChanged = (mode->surfaceFormat.bytesPerPixel != format.bytesPerPixel);
+	bool texFmtChanged = (mode->textureFormat != texture.fmt);
+
+	bool srfDataReinitNeeded = (pwrW_hChanged || sfcBppChanged || !pixels);
+	bool textureReinitNeeded = (pwrW_hChanged || texFmtChanged || !texture.data);
+
+	actualWidth = width;
+	actualHeight = height;
+	format = mode->surfaceFormat;
+	textureTransferFlags = mode->textureTransferFlags;
+	w = wPow;
+	h = hPow;
+	pitch = w * format.bytesPerPixel;
+	dirtyPixels = true;
+
+	if (width && height) {
+		// Don't needlessly reinitialize surface pixels.
+		if (srfDataReinitNeeded) {
+			linearFree(pixels);
+			pixels = linearAlloc(h * pitch);
+		}
+		// Don't needlessly reinitialize C3D_Tex data.
+		if (textureReinitNeeded) {
+			C3D_TexDelete(&texture);
+			if (vram) {
+				if (!C3D_TexInitVRAM(&texture, w, h, mode->textureFormat))
+					C3D_TexInit(&texture, w, h, mode->textureFormat);
+			} else
+				C3D_TexInit(&texture, w, h, mode->textureFormat);
+		}
+		assert(pixels && texture.data);
+		clear();
+	}
+
+	float x = 0.f, y = 0.f;
+	float u = (float)width/w;
+	float v = (float)height/h;
+	vertex tmp[4] = {
+		{{x,       y,        0.5f}, {0, 0}},
+		{{x+width, y,        0.5f}, {u, 0}},
+		{{x,       y+height, 0.5f}, {0, v}},
+		{{x+width, y+height, 0.5f}, {u, v}},
+	};
+	memcpy(vertices, tmp, sizeof(vertex) * 4);
+}
+
+void Sprite::free() {
+	linearFree(pixels);
+	C3D_TexDelete(&texture);
+	pixels = 0;
+	w = h = pitch = 0;
+	actualWidth = actualHeight = 0;
+	format = Graphics::PixelFormat();
+}
+
+void Sprite::convertToInPlace(const Graphics::PixelFormat &dstFormat, const byte *palette) {
+	//
+}
+
+void Sprite::transfer() {
+	if (pixels && dirtyPixels) {
+		dirtyPixels = false;
+		GSPGPU_FlushDataCache(pixels, w * h * format.bytesPerPixel);
+		C3D_SyncDisplayTransfer((u32*)pixels, GX_BUFFER_DIM(w, h), (u32*)texture.data, GX_BUFFER_DIM(w, h), textureTransferFlags);
+	}
+}
+
+void Sprite::render() {
+	C3D_TexBind(0, &texture);
+
+	C3D_BufInfo *bufInfo = C3D_GetBufInfo();
+	BufInfo_Init(bufInfo);
+	BufInfo_Add(bufInfo, vertices, sizeof(vertex), 2, 0x10);
+	C3D_DrawArrays(GPU_TRIANGLE_STRIP, 0, 4);
+}
+
+void Sprite::clear(uint32 color) {
+	dirtyPixels = true;
+	memset(pixels, color, w * h * format.bytesPerPixel);
+}
+
+void Sprite::setScale (float x, float y) {
+	if (x != scaleX || y != scaleY) {
+		scaleX = x;
+		scaleY = y;
+		dirtyMatrix = true;
+	}
+}
+
+void Sprite::setPosition(int x, int y) {
+	if (x != posX || y != posY) {
+		posX = x;
+		posY = y;
+		dirtyMatrix = true;
+	}
+}
+
+void Sprite::setOffset(uint16 x, uint16 y) {
+	offsetX = x;
+	offsetY = y;
+	dirtyMatrix = true;
+}
+
+C3D_Mtx* Sprite::getMatrix() {
+	if (dirtyMatrix) {
+		dirtyMatrix = false;
+		Mtx_Identity(&modelview);
+		Mtx_Scale(&modelview, scaleX, scaleY, 1.f);
+		Mtx_Translate(&modelview, posX - offsetX, posY - offsetY, 0, true);
+	}
+	return &modelview;
+}
+
+void Sprite::setFilteringMode(bool enableLinearFiltering) {
+	GPU_TEXTURE_FILTER_PARAM filteringMode = enableLinearFiltering ? GPU_LINEAR : GPU_NEAREST;
+	C3D_TexSetFilter(&texture, filteringMode, filteringMode);
+}
+
+} // namespace N3DS