Add MIP Mapping Sample (#44)

* MIP Mapping sample

* Add files via upload

* MIP Mapping Sample

* Update mipmapping.c

src/samples/gu/mipmapping/Makefile.sample

@@ -0,0 +1,26 @@
+TARGET = MIPMAPPING
+OBJS = mipmapping.o mip0.o mip1.o mip2.o
+
+INCDIR =
+CFLAGS = -G0 -Wall -O2 
+CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
+ASFLAGS = $(CFLAGS)
+
+LIBDIR =
+LDFLAGS = 
+
+LIBS = -lpspgum -lpspgu -lm
+
+EXTRA_TARGETS = EBOOT.PBP
+PSP_EBOOT_TITLE = MIP Mapping Sample
+
+PSPSDK=$(shell psp-config --pspsdk-path)
+include $(PSPSDK)/lib/build.mak
+
+mip0.o: mip0.raw
+	bin2o -i mip0.raw mip0.o mip0
+mip1.o: mip1.raw
+	bin2o -i mip1.raw mip1.o mip1
+mip2.o: mip2.raw
+	bin2o -i mip2.raw mip2.o mip2
+

src/samples/gu/mipmapping/mipmapping.c

@@ -0,0 +1,150 @@
+///TV
+/*
+ * PSP Software Development Kit - http://www.pspdev.org
+ * -----------------------------------------------------------------------
+ * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
+ *
+ * Copyright (c) 2005 Jesper Svennevid
+ */
+
+#include <pspkernel.h>
+#include <pspdisplay.h>
+#include <pspdebug.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+
+#include <pspgu.h>
+#include <pspgum.h>
+
+
+PSP_MODULE_INFO("MIP Mapping Sample", 0, 1, 1);
+PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER);
+
+static unsigned int __attribute__((aligned(16))) list[262144];
+
+extern unsigned char mip0_start[];
+extern unsigned char mip1_start[];
+extern unsigned char mip2_start[];
+
+struct Vertex{
+	float u, v;
+	float x,y,z;
+};
+
+//A plane
+struct Vertex __attribute__((aligned(16))) vertices[2*3] =
+{
+	{0, 0, -1, 1, 0}, // 0
+	{1, 0,  1, 1, 0}, // 4
+	{1, 1,  1, -1, 0}, // 5
+
+	{0, 0, -1, 1, 0}, // 0
+	{1, 1,  1,-1, 0}, // 5
+	{0, 1, -1,-1, 0}, // 1
+
+};
+
+#define BUF_WIDTH (512)
+#define SCR_WIDTH (480)
+#define SCR_HEIGHT (272)
+
+int main(int argc, char* argv[])
+{
+	// setup GU
+	void* fbp0 = (void*)(4 * 480 * 272);
+	void* fbp1 = (void*)(4 * 480 * 272);
+	void* zbp = (void*)(2 * 480 * 272);
+
+	sceGuInit();
+	sceGuStart(GU_DIRECT,list);
+	sceGuDrawBuffer(GU_PSM_8888,fbp0,BUF_WIDTH);
+	sceGuDispBuffer(SCR_WIDTH,SCR_HEIGHT,fbp1,BUF_WIDTH);
+	sceGuDepthBuffer(zbp,BUF_WIDTH);
+	sceGuOffset(2048 - (SCR_WIDTH/2),2048 - (SCR_HEIGHT/2));
+	sceGuViewport(2048,2048,SCR_WIDTH,SCR_HEIGHT);
+	sceGuDepthRange(65535,0);
+	sceGuScissor(0,0,SCR_WIDTH,SCR_HEIGHT);
+	sceGuEnable(GU_SCISSOR_TEST);
+	sceGuDepthFunc(GU_GEQUAL);
+	sceGuEnable(GU_DEPTH_TEST);
+	sceGuShadeModel(GU_SMOOTH);
+	sceGuDisable(GU_CULL_FACE);
+	sceGuEnable(GU_TEXTURE_2D);
+	//sceGuEnable(GU_CLIP_PLANES);
+	sceGuFinish();
+	sceGuSync(0,0);
+
+	sceDisplayWaitVblankStart();
+	sceGuDisplay(GU_TRUE);
+
+	// run sample
+	float pos_z = -2.5;
+	int zoom = -1;
+	while(1){
+		sceGuStart(GU_DIRECT,list);
+
+		// clear screen
+
+		sceGuClearColor(0xff554433);
+		sceGuClearDepth(0);
+		sceGuClear(GU_COLOR_BUFFER_BIT|GU_DEPTH_BUFFER_BIT);
+
+		// setup matrices for cube
+		//Projection
+		sceGumMatrixMode(GU_PROJECTION);
+		sceGumLoadIdentity();
+		sceGumPerspective(75.0f,16.0f/9.0f,0.5,100);
+
+		//camera view
+		sceGumMatrixMode(GU_VIEW);
+		sceGumLoadIdentity();
+		{
+			ScePspFVector3 cpos = { 0, 0, 0};
+			sceGumTranslate(&cpos);
+		}
+		
+		//Model
+		sceGumMatrixMode(GU_MODEL);
+		sceGumLoadIdentity();
+		{
+			ScePspFVector3 pos = { 0, 0, pos_z};
+			sceGumTranslate(&pos);
+		}
+
+		//Zomm plane in and out to see mip mapping
+		if (pos_z > -2) zoom = -1;
+		if (pos_z < -12) zoom = 1;
+		if (zoom == -1) pos_z-= 0.02;
+		if (zoom == 1) pos_z+= 0.02;
+
+		// setup texture
+		sceGuTexMode(GU_PSM_8888,2, 0, 0);
+		sceGuTexFunc(GU_TFX_MODULATE, GU_TCC_RGBA); 
+		sceGuTexLevelMode(GU_TEXTURE_AUTO, 0);
+		//Set your filters according to what you want
+		sceGuTexFilter(GU_LINEAR_MIPMAP_LINEAR, GU_LINEAR);
+
+		//Set three textures for MIP Mapping
+		sceGuTexImage(0,128,128,128,mip0_start);
+		sceGuTexImage(1,64,64,64,mip1_start);
+		sceGuTexImage(2,32,32,32,mip2_start);
+		
+		sceGuColor(0xffffffff);
+		sceGuAmbientColor(0xffffffff);
+		sceGumDrawArray(GU_TRIANGLES,GU_TEXTURE_32BITF|GU_VERTEX_32BITF|GU_TRANSFORM_3D,2*3,0,vertices);
+
+		sceGuFinish();
+		sceGuSync(0,0);
+
+		sceDisplayWaitVblankStart();
+		sceGuSwapBuffers();
+	}
+
+	sceGuTerm();
+
+	sceKernelExitGame();
+	return 0;
+}
+