3DS: Implement adjustable filtering and sprite rotation

CHANGES

@@ -66,6 +66,7 @@ Misc:
  - Util: Add Vector GetConstPointer
  - Util: Add rtrim
  - GBA Memory: Optimize Load-/StoreMultiple
+ - 3DS: Adjustable filering
 
 0.4.1: (2016-07-11)
 Bugfixes:

src/platform/3ds/CMakeLists.txt

@@ -30,12 +30,9 @@ set(OS_DEFINES ${OS_DEFINES} PARENT_SCOPE)
 
 list(APPEND GUI_SRC
 	${CMAKE_CURRENT_BINARY_DIR}/icons.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.c
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.h
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin.h
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin.h
 
 	${CMAKE_CURRENT_SOURCE_DIR}/gui-font.c
 	${CMAKE_CURRENT_SOURCE_DIR}/ctr-gpu.c
@@ -43,12 +40,9 @@ list(APPEND GUI_SRC
 
 set_source_files_properties(
 	${CMAKE_CURRENT_BINARY_DIR}/icons.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.c
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.h
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin.h
+	${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.c
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.h
-	${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin.h
 	PROPERTIES GENERATED ON)
 
 add_executable(${BINARY_NAME}.elf ${GUI_SRC} main.c)
@@ -68,36 +62,21 @@ add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/icons.c
                    DEPENDS ${CMAKE_SOURCE_DIR}/src/platform/3ds/icons.raw)
 
 add_custom_command(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin.h
+	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin.h
-	MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/uishader.g.pica
+	DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/uishader.v.pica ${CMAKE_CURRENT_SOURCE_DIR}/uishader.g.pica
 	COMMAND ${PICASSO}
-		-o ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin
+		-o ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin
-		-h ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin.h
+		-h ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin.h
-		${CMAKE_CURRENT_SOURCE_DIR}/uishader.g.pica
-	COMMENT "picasso uishader.g.pica")
-
-add_custom_command(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.c ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.h
-	MAIN_DEPENDENCY ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin
-	COMMAND ${RAW2C} ${CMAKE_CURRENT_BINARY_DIR}/uishader_g.shbin
-	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-	COMMENT "raw2c uishader.g.shbin")
-
-add_custom_command(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin.h
-	MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/uishader.v.pica
-	COMMAND ${PICASSO}
-		-o ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin
-		-h ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin.h
 		${CMAKE_CURRENT_SOURCE_DIR}/uishader.v.pica
-	COMMENT "picasso uishader.v.pica")
+		${CMAKE_CURRENT_SOURCE_DIR}/uishader.g.pica
+	COMMENT "picasso uishader.shbin")
 
 add_custom_command(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.c ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.h
+	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/uishader.c ${CMAKE_CURRENT_BINARY_DIR}/uishader.h
-	MAIN_DEPENDENCY ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin
+	MAIN_DEPENDENCY ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin
-	COMMAND ${RAW2C} ${CMAKE_CURRENT_BINARY_DIR}/uishader_v.shbin
+	COMMAND ${RAW2C} ${CMAKE_CURRENT_BINARY_DIR}/uishader.shbin
 	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-	COMMENT "raw2c uishader.v.shbin")
+	COMMENT "raw2c uishader.shbin")
 
 add_custom_command(OUTPUT ${BINARY_NAME}.3dsx
                    COMMAND ${3DSXTOOL} ${BINARY_NAME}.elf ${BINARY_NAME}.3dsx --smdh=${BINARY_NAME}.smdh

src/platform/3ds/ctr-gpu.c

@@ -14,10 +14,8 @@
 
 #include "ctr-gpu.h"
 
-#include "uishader_v.h"
+#include "uishader.h"
-#include "uishader_v.shbin.h"
+#include "uishader.shbin.h"
-#include "uishader_g.h"
-#include "uishader_g.shbin.h"
 
 struct ctrUIVertex {
 	short x, y;
@@ -25,6 +23,7 @@ struct ctrUIVertex {
 	short u, v;
 	short uw, vh;
 	u32 abgr;
+	float rotate[2];
 };
 
 #define MAX_NUM_QUADS 256
@@ -36,34 +35,31 @@ static int ctrVertStart = 0;
 
 static C3D_Tex* activeTexture = NULL;
 
-static shaderProgram_s gpuShader;
+static shaderProgram_s uiProgram;
-static DVLB_s* vertexShader = NULL;
+static DVLB_s* uiShader = NULL;
-static DVLB_s* geometryShader = NULL;
+static int GSH_FVEC_projectionMtx;
+static int GSH_FVEC_textureMtx;
 
 bool ctrInitGpu() {
 	// Load vertex shader binary
-	vertexShader = DVLB_ParseFile((u32*) uishader_v, uishader_v_size);
+	uiShader = DVLB_ParseFile((u32*) uishader, uishader_size);
-	if (vertexShader == NULL) {
+	if (uiShader == NULL) {
-		return false;
-	}
-
-	// Load geometry shader binary
-	geometryShader = DVLB_ParseFile((u32*) uishader_g, uishader_g_size);
-	if (geometryShader == NULL) {
 		return false;
 	}
 
 	// Create shader
-	shaderProgramInit(&gpuShader);
+	shaderProgramInit(&uiProgram);
-	Result res = shaderProgramSetVsh(&gpuShader, &vertexShader->DVLE[0]);
+	Result res = shaderProgramSetVsh(&uiProgram, &uiShader->DVLE[0]);
 	if (res < 0) {
 		return false;
 	}
-	res = shaderProgramSetGsh(&gpuShader, &geometryShader->DVLE[0], 3);
+	res = shaderProgramSetGsh(&uiProgram, &uiShader->DVLE[1], 4);
 	if (res < 0) {
 		return false;
 	}
-	C3D_BindProgram(&gpuShader);
+	C3D_BindProgram(&uiProgram);
+	GSH_FVEC_projectionMtx = shaderInstanceGetUniformLocation(uiProgram.geometryShader, "projectionMtx");
+	GSH_FVEC_textureMtx = shaderInstanceGetUniformLocation(uiProgram.geometryShader, "textureMtx");
 
 	// Allocate buffers
 	ctrVertexBuffer = linearAlloc(VERTEX_BUFFER_SIZE);
@@ -82,6 +78,7 @@ bool ctrInitGpu() {
 	AttrInfo_AddLoader(attrInfo, 0, GPU_SHORT, 4); // in_pos
 	AttrInfo_AddLoader(attrInfo, 1, GPU_SHORT, 4); // in_tc0
 	AttrInfo_AddLoader(attrInfo, 2, GPU_UNSIGNED_BYTE, 4); // in_col
+	AttrInfo_AddLoader(attrInfo, 3, GPU_FLOAT, 2); // in_rot
 
 	return true;
 }
@@ -92,23 +89,22 @@ void ctrDeinitGpu() {
 		ctrVertexBuffer = NULL;
 	}
 
-	shaderProgramFree(&gpuShader);
+	shaderProgramFree(&uiProgram);
 
-	if (vertexShader) {
+	if (uiShader) {
-		DVLB_Free(vertexShader);
+		DVLB_Free(uiShader);
-		vertexShader = NULL;
+		uiShader = NULL;
-	}
-
-	if (geometryShader) {
-		DVLB_Free(geometryShader);
-		geometryShader = NULL;
 	}
 }
 
-void ctrSetViewportSize(s16 w, s16 h) {
+void ctrSetViewportSize(s16 w, s16 h, bool tilt) {
 	C3D_SetViewport(0, 0, h, w);
 	C3D_Mtx projectionMtx;
-	Mtx_OrthoTilt(&projectionMtx, 0.0, w, h, 0.0, 0.0, 1.0);
+	if (tilt) {
+		Mtx_OrthoTilt(&projectionMtx, 0.0, w, h, 0.0, 0.0, 1.0, true);
+	} else {
+		Mtx_Ortho(&projectionMtx, 0.0, w, 0.0, h, 0.0, 1.0, true);
+	}
 	C3D_FVUnifMtx4x4(GPU_GEOMETRY_SHADER, GSH_FVEC_projectionMtx, &projectionMtx);
 }
 
@@ -145,7 +141,7 @@ void ctrActivateTexture(C3D_Tex* texture) {
 	C3D_FVUnifMtx2x4(GPU_GEOMETRY_SHADER, GSH_FVEC_textureMtx, &textureMtx);
 }
 
-void ctrAddRectScaled(u32 color, s16 x, s16 y, s16 w, s16 h, s16 u, s16 v, s16 uw, s16 vh) {
+void ctrAddRectEx(u32 color, s16 x, s16 y, s16 w, s16 h, s16 u, s16 v, s16 uw, s16 vh, float rotate) {
 	if (x >= 400 && w >= 0) {
 		return;
 	}
@@ -170,12 +166,14 @@ void ctrAddRectScaled(u32 color, s16 x, s16 y, s16 w, s16 h, s16 u, s16 v, s16 u
 	vtx->uw = uw;
 	vtx->vh = vh;
 	vtx->abgr = color;
+	vtx->rotate[0] = cosf(rotate);
+	vtx->rotate[1] = sinf(rotate);
 
 	++ctrNumVerts;
 }
 
 void ctrAddRect(u32 color, s16 x, s16 y, s16 u, s16 v, s16 w, s16 h) {
-	ctrAddRectScaled(color, x, y, w, h, u, v, w, h);
+	ctrAddRectEx(color, x, y, w, h, u, v, w, h, 0);
 }
 
 void ctrFlushBatch(void) {
@@ -185,7 +183,7 @@ void ctrFlushBatch(void) {
 
 	C3D_BufInfo* bufInfo = C3D_GetBufInfo();
 	BufInfo_Init(bufInfo);
-	BufInfo_Add(bufInfo, &ctrVertexBuffer[ctrVertStart], sizeof(struct ctrUIVertex), 3, 0x210);
+	BufInfo_Add(bufInfo, &ctrVertexBuffer[ctrVertStart], sizeof(struct ctrUIVertex), 4, 0x3210);
 
 	GSPGPU_FlushDataCache(&ctrVertexBuffer[ctrVertStart], sizeof(struct ctrUIVertex) * ctrNumVerts);
 	C3D_DrawArrays(GPU_GEOMETRY_PRIM, 0, ctrNumVerts);

src/platform/3ds/ctr-gpu.h

@@ -14,10 +14,10 @@
 bool ctrInitGpu(void);
 void ctrDeinitGpu(void);
 
-void ctrSetViewportSize(s16 w, s16 h);
+void ctrSetViewportSize(s16 w, s16 h, bool tilt);
 
 void ctrActivateTexture(C3D_Tex* texture);
-void ctrAddRectScaled(u32 color, s16 x, s16 y, s16 w, s16 h, s16 u, s16 v, s16 uw, s16 vh);
+void ctrAddRectEx(u32 color, s16 x, s16 y, s16 w, s16 h, s16 u, s16 v, s16 uw, s16 vh, float rotate);
 void ctrAddRect(u32 color, s16 x, s16 y, s16 u, s16 v, s16 w, s16 h);
 void ctrFlushBatch(void);
 void ctrFinalize(void);

src/platform/3ds/gui-font.c

@@ -107,7 +107,9 @@ void GUIFontDrawGlyph(const struct GUIFont* font, int glyph_x, int glyph_y, uint
 	u16 u = tex->width * data.texcoord.left;
 	u16 v = tex->height * data.texcoord.bottom;
 
-	ctrAddRectScaled(color, x, y, tex->width * width * FONT_SIZE, tex->height * height * -FONT_SIZE, u, v, tex->width * width, tex->height * height);
+	ctrAddRectEx(color, x, y,
+	             tex->width * width * FONT_SIZE, tex->height * height * -FONT_SIZE,
+	             u, v, tex->width * width, tex->height * height, 0);
 }
 
 void GUIFontDrawIcon(const struct GUIFont* font, int x, int y, enum GUIAlignment align, enum GUIOrientation orient, uint32_t color, enum GUIIcon icon) {
@@ -136,10 +138,16 @@ void GUIFontDrawIcon(const struct GUIFont* font, int x, int y, enum GUIAlignment
 	}
 	switch (orient) {
 	case GUI_ORIENT_HMIRROR:
-		ctrAddRectScaled(color, x + metric.width, y, -metric.width, metric.height, metric.x, metric.y, metric.width, metric.height);
+		ctrAddRectEx(color, x + metric.width, y,
+		             -metric.width, metric.height,
+		             metric.x, metric.y,
+		             metric.width, metric.height, 0);
 		break;
 	case GUI_ORIENT_VMIRROR:
-		ctrAddRectScaled(color, x, y + metric.height, metric.width, -metric.height, metric.x, metric.y, metric.width, metric.height);
+		ctrAddRectEx(color, x, y + metric.height,
+		             metric.width, -metric.height,
+		             metric.x, metric.y,
+		             metric.width, metric.height, 0);
 		break;
 	case GUI_ORIENT_0:
 	default:
@@ -157,5 +165,9 @@ void GUIFontDrawIconSize(const struct GUIFont* font, int x, int y, int w, int h,
 	}
 
 	struct GUIIconMetric metric = defaultIconMetrics[icon];
-	ctrAddRectScaled(color, x, y, w ? w : metric.width, h ? h : metric.height, metric.x, metric.y, metric.width, metric.height);
+	ctrAddRectEx(color, x, y,
+	             w ? w : metric.width,
+	             h ? h : metric.height,
+	             metric.x, metric.y,
+	             metric.width, metric.height, 0);
 }

src/platform/3ds/main.c

@@ -35,6 +35,13 @@ static enum ScreenMode {
 	SM_MAX
 } screenMode = SM_PA_TOP;
 
+static enum FilterMode {
+	FM_NEAREST,
+	FM_LINEAR_1x,
+	FM_LINEAR_2x,
+	FM_MAX
+} filterMode = FM_LINEAR_2x;
+
 #define _3DS_INPUT 0x3344534B
 
 #define AUDIO_SAMPLES 384
@@ -68,6 +75,7 @@ static bool frameLimiter = true;
 
 static C3D_RenderBuf bottomScreen;
 static C3D_RenderBuf topScreen;
+static C3D_RenderBuf upscaleBuffer;
 
 static aptHookCookie cookie;
 
@@ -78,7 +86,7 @@ static bool _initGpu(void) {
 		return false;
 	}
 
-	if (!C3D_RenderBufInit(&topScreen, 240, 400, GPU_RB_RGB8, 0) || !C3D_RenderBufInit(&bottomScreen, 240, 320, GPU_RB_RGB8, 0)) {
+	if (!C3D_RenderBufInit(&topScreen, 240, 400, GPU_RB_RGB8, 0) || !C3D_RenderBufInit(&bottomScreen, 240, 320, GPU_RB_RGB8, 0) || !C3D_RenderBufInit(&upscaleBuffer, 512, 512, GPU_RB_RGB565, 0)) {
 		return false;
 	}
 
@@ -94,6 +102,7 @@ static void _cleanup(void) {
 
 	C3D_RenderBufDelete(&topScreen);
 	C3D_RenderBufDelete(&bottomScreen);
+	C3D_RenderBufDelete(&upscaleBuffer);
 	C3D_Fini();
 
 	gfxExit();
@@ -210,7 +219,7 @@ static void _guiPrepare(void) {
 	}
 
 	C3D_RenderBufBind(&bottomScreen);
-	ctrSetViewportSize(320, 240);
+	ctrSetViewportSize(320, 240, true);
 }
 
 static void _guiFinish(void) {
@@ -248,6 +257,14 @@ static void _setup(struct mGUIRunner* runner) {
 	if (mCoreConfigGetUIntValue(&runner->config, "screenMode", &mode) && mode < SM_MAX) {
 		screenMode = mode;
 	}
+	if (mCoreConfigGetUIntValue(&runner->config, "filterMode", &mode) && mode < FM_MAX) {
+		filterMode = mode;
+		if (filterMode == FM_NEAREST) {
+			C3D_TexSetFilter(&upscaleBuffer.colorBuf, GPU_NEAREST, GPU_NEAREST);
+		} else {
+			C3D_TexSetFilter(&upscaleBuffer.colorBuf, GPU_LINEAR, GPU_LINEAR);
+		}
+	}
 	frameLimiter = true;
 
 	runner->core->setAudioBufferSize(runner->core, AUDIO_SAMPLES);
@@ -292,9 +309,17 @@ static void _gameLoaded(struct mGUIRunner* runner) {
 		memset(audioLeft, 0, AUDIO_SAMPLE_BUFFER * 2 * sizeof(int16_t));
 	}
 	unsigned mode;
-	if (mCoreConfigGetUIntValue(&runner->config, "screenMode", &mode) && mode != screenMode) {
+	if (mCoreConfigGetUIntValue(&runner->config, "screenMode", &mode) && mode < SM_MAX) {
 		screenMode = mode;
 	}
+	if (mCoreConfigGetUIntValue(&runner->config, "filterMode", &mode) && mode < FM_MAX) {
+		filterMode = mode;
+		if (filterMode == FM_NEAREST) {
+			C3D_TexSetFilter(&upscaleBuffer.colorBuf, GPU_NEAREST, GPU_NEAREST);
+		} else {
+			C3D_TexSetFilter(&upscaleBuffer.colorBuf, GPU_LINEAR, GPU_LINEAR);
+		}
+	}
 }
 
 static void _gameUnloaded(struct mGUIRunner* runner) {
@@ -330,20 +355,27 @@ static void _gameUnloaded(struct mGUIRunner* runner) {
 }
 
 static void _drawTex(struct mCore* core, bool faded) {
-	if (screenMode < SM_PA_TOP) {
+	unsigned screen_w, screen_h;
+	switch (screenMode) {
+	case SM_PA_TOP:
 		C3D_RenderBufBind(&bottomScreen);
-		ctrSetViewportSize(320, 240);
+		screen_w = 320;
-	} else {
+		screen_h = 240;
+		break;
+	case SM_PA_BOTTOM:
 		C3D_RenderBufBind(&topScreen);
-		ctrSetViewportSize(400, 240);
+		screen_w = 400;
+		screen_h = 240;
+		break;
+	default:
+		C3D_RenderBufBind(&upscaleBuffer);
+		screen_w = upscaleBuffer.colorBuf.width;
+		screen_h = upscaleBuffer.colorBuf.height;
+		break;
 	}
-	ctrActivateTexture(&outputTexture);
 
 	u32 color = faded ? 0x3FFFFFFF : 0xFFFFFFFF;
 
-	int screen_w = screenMode < SM_PA_TOP ? 320 : 400;
-	int screen_h = 240;
-
 	unsigned corew, coreh;
 	core->desiredVideoDimensions(core, &corew, &coreh);
 
@@ -356,17 +388,57 @@ static void _drawTex(struct mCore* core, bool faded) {
 		w = temp;
 	}
 	int gcd = h;
-	int aspectw = corew / gcd;
+	unsigned aspectw = corew / gcd;
-	int aspecth = coreh / gcd;
+	unsigned aspecth = coreh / gcd;
+	int x = 0;
+	int y = 0;
 
 	switch (screenMode) {
 	case SM_PA_TOP:
 	case SM_PA_BOTTOM:
-	default:
 		w = corew;
 		h = coreh;
+		x = (screen_w - w) / 2;
+		y = (screen_h - h) / 2;
+		ctrSetViewportSize(screen_w, screen_h, true);
+		ctrActivateTexture(&outputTexture);
 		break;
 	case SM_AF_TOP:
+	case SM_AF_BOTTOM:
+	case SM_SF_TOP:
+	case SM_SF_BOTTOM:
+	default:
+		if (filterMode == FM_LINEAR_1x) {
+			w = corew;
+			h = coreh;
+		} else {
+			w = corew * 2;
+			h = coreh * 2;
+		}
+		ctrSetViewportSize(screen_w, screen_h, false);
+		ctrActivateTexture(&outputTexture);
+		break;
+	}
+
+	ctrAddRectEx(color, x, y, w, h, 0, 0, corew, coreh, 0);
+	ctrFlushBatch();
+
+	corew = w;
+	coreh = h;
+	screen_h = 240;
+	if (screenMode < SM_PA_TOP) {
+		C3D_RenderBufBind(&bottomScreen);
+		screen_w = 320;
+	} else {
+		C3D_RenderBufBind(&topScreen);
+		screen_w = 400;
+	}
+	ctrSetViewportSize(screen_w, screen_h, true);
+
+	switch (screenMode) {
+	default:
+		return;
+	case SM_AF_TOP:
 	case SM_AF_BOTTOM:
 		w = screen_w / aspectw;
 		h = screen_h / aspecth;
@@ -385,10 +457,10 @@ static void _drawTex(struct mCore* core, bool faded) {
 		break;
 	}
 
-	int x = (screen_w - w) / 2;
+	x = (screen_w - w) / 2;
-	int y = (screen_h - h) / 2;
+	y = (screen_h - h) / 2;
-
+	ctrActivateTexture(&upscaleBuffer.colorBuf);
-	ctrAddRectScaled(color, x, y, w, h, 0, 0, corew, coreh);
+	ctrAddRectEx(color, x, y, w, h, 0, 0, corew, coreh, 0);
 	ctrFlushBatch();
 }
 
@@ -604,7 +676,8 @@ int main() {
 		return 1;
 	}
 	C3D_TexSetWrap(&outputTexture, GPU_CLAMP_TO_EDGE, GPU_CLAMP_TO_EDGE);
-	C3D_TexSetFilter(&outputTexture, GPU_LINEAR, GPU_LINEAR);
+	C3D_TexSetFilter(&outputTexture, GPU_NEAREST, GPU_NEAREST);
+	C3D_TexSetFilter(&upscaleBuffer.colorBuf, GPU_LINEAR, GPU_LINEAR);
 	void* outputTextureEnd = (u8*)outputTexture.data + 256 * 256 * 2;
 
 	// Zero texture data to make sure no garbage around the border interferes with filtering
@@ -686,9 +759,21 @@ int main() {
 					"Stretched/Top",
 				},
 				.nStates = 6
+			},
+			{
+				.title = "Filtering",
+				.data = "filterMode",
+				.submenu = 0,
+				.state = FM_LINEAR_2x,
+				.validStates = (const char*[]) {
+					NULL, // Disable choosing nearest neighbor; it always looks bad
+					"Bilinear (smooter)",
+					"Bilinear (pixelated)",
+				},
+				.nStates = 3
 			}
 		},
-		.nConfigExtra = 1,
+		.nConfigExtra = 2,
 		.setup = _setup,
 		.teardown = 0,
 		.gameLoaded = _gameLoaded,

src/platform/3ds/uishader.g.pica

@@ -5,6 +5,14 @@
 ; License, v. 2.0. If a copy of the MPL was not distributed with this
 ; file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+; Inputs
+.alias in_pos v0 ; [x, y, w, h]
+.alias in_tc0 v1 ; [u, v, uw, vh]
+.alias in_col v2
+.alias in_rot v3
+
+.gsh point c0
+
 ; Uniforms
 .fvec projectionMtx[4]
 .fvec textureMtx[2]
@@ -12,59 +20,77 @@
 ; Constants
 .constf consts1(0.0, 1.0, -0.5, -1.0)
 
-; Outputs : here only position and color
+; Outputs
 .out out_pos position
 .out out_tc0 texcoord0
 .out out_col color
 
-; Inputs : here we have only vertices
+.entry gshMain
-.alias in_pos v0
+.proc gshMain
-.alias in_tc0 v1
-.alias in_col v2
-
-.gsh
-.proc main
 	; Set up the vertex endpoints
-	mov r0.xy, in_pos.xy
+	mov r0.xy, in_pos.zw
-	mov r0.zw, consts1.zy
+	mov r0.zw, consts1.xx
-	add r1.xy, r0.xy, in_pos.zw
+	mov r4.xy, in_pos.xy
+	add r5, r4.xyzw, r0.xwww
+	add r6, r4.xyzw, r0.xyww
+	add r7, r4.xyzw, r0.wyww
 
-	dp4 r2.x, projectionMtx[0], r0
+	; Create rotation matrix
-	dp4 r2.y, projectionMtx[1], r0
+	mov r8, in_rot.xzww
-	dp4 r2.z, projectionMtx[2], r0
+	mov r9, in_rot.yxww
-	dp4 r2.w, projectionMtx[3], r0
+	mov r10.zw, consts1.zy
 
-	dp4 r3.x, projectionMtx[0], r1
+	; Transform coordinates
-	dp4 r3.y, projectionMtx[1], r1
+	dp4 r10.x, r8, r4
-	dp4 r3.z, projectionMtx[2], r1
+	dp4 r10.y, r9, r4
-	dp4 r3.w, projectionMtx[3], r1
+	dp4 r0.x, projectionMtx[0], r10
+	dp4 r0.y, projectionMtx[1], r10
+	dp4 r0.z, projectionMtx[2], r10
+	dp4 r0.w, projectionMtx[3], r10
+
+	dp4 r10.x, r8, r5
+	dp4 r10.y, r9, r5
+	dp4 r1.x, projectionMtx[0], r10
+	dp4 r1.y, projectionMtx[1], r10
+	dp4 r1.z, projectionMtx[2], r10
+	dp4 r1.w, projectionMtx[3], r10
+
+	dp4 r10.x, r8, r6
+	dp4 r10.y, r9, r6
+	dp4 r2.x, projectionMtx[0], r10
+	dp4 r2.y, projectionMtx[1], r10
+	dp4 r2.z, projectionMtx[2], r10
+	dp4 r2.w, projectionMtx[3], r10
+
+	dp4 r10.x, r8, r7
+	dp4 r10.y, r9, r7
+	dp4 r3.x, projectionMtx[0], r10
+	dp4 r3.y, projectionMtx[1], r10
+	dp4 r3.z, projectionMtx[2], r10
+	dp4 r3.w, projectionMtx[3], r10
 
 	; Set up the texture endpoints
-	mov r0.xy, in_tc0.xy
+	mov r6.xy, in_tc0.xy
-	mov r0.zw, consts1.xy
+	add r7.xy, r6.xy, in_tc0.zw
-	add r1.xy, r0.xy, in_tc0.zw
 
-	dp4 r4.x, textureMtx[0], r0
+	dp4 r4.x, textureMtx[0], r6
-	dp4 r4.y, textureMtx[1], r0
+	dp4 r4.y, textureMtx[1], r6
 	mov r4.zw, consts1.xy
 
-	dp4 r5.x, textureMtx[0], r1
+	dp4 r5.x, textureMtx[0], r7
-	dp4 r5.y, textureMtx[1], r1
+	dp4 r5.y, textureMtx[1], r7
 	mov r5.zw, consts1.xy
 
 	; Emit top-left
 	setemit 0
-	mov out_pos.xyzw, r2.xyzw
+	mov out_pos, r0
 	mov out_tc0.xyzw, r4.xyzw
 	mov out_col, in_col
 	emit
 
 	; Emit bottom-left
 	setemit 1
-	mov out_pos.x, r2.x
+	mov out_pos, r1
-	mov out_pos.y, r3.y
-	mov out_pos.z, consts1.z
-	mov out_pos.w, consts1.y
 	mov out_tc0.x, r5.x
 	mov out_tc0.y, r4.y
 	mov out_tc0.z, consts1.x
@@ -74,17 +100,14 @@
 
 	; Emit bottom-right
 	setemit 2, prim
-	mov out_pos.xyzw, r3.xyzw
+	mov out_pos, r2
 	mov out_tc0.xyzw, r5.xyzw
 	mov out_col, in_col
 	emit
 
 	; Emit top-right
 	setemit 1, prim inv
-	mov out_pos.x, r3.x
+	mov out_pos, r3
-	mov out_pos.y, r2.y
-	mov out_pos.z, consts1.z
-	mov out_pos.w, consts1.y
 	mov out_tc0.x, r4.x
 	mov out_tc0.y, r5.y
 	mov out_tc0.z, consts1.x

src/platform/3ds/uishader.v.pica

@@ -18,15 +18,19 @@
 .out out_pos position
 .out out_tc0 texcoord0
 .out out_col color
+.out out_rot dummy
 
 ; Inputs
 .alias in_pos v0
 .alias in_tc0 v1
 .alias in_col v2
+.alias in_rot v3
 
-.proc main
+.entry vshMain
+.proc vshMain
 	mov out_pos, in_pos
 	mov out_tc0, in_tc0
+	mul out_rot, consts1.ywyx, in_rot.xyy
 
 	; Normalize color by multiplying by 1 / 255
 	mul out_col, consts1.z, in_col