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@wwylele
Created July 5, 2018 07:43
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proctex mipmap test
#include <3ds.h>
#include <citro3d.h>
#include <tex3ds.h>
#include <string.h>
#include <stdlib.h>
#include "vshader_shbin.h"
#define CLEAR_COLOR 0x68B0D8FF
#define DISPLAY_TRANSFER_FLAGS \
(GX_TRANSFER_FLIP_VERT(0) | GX_TRANSFER_OUT_TILED(0) | GX_TRANSFER_RAW_COPY(0) | \
GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGBA8) | GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB8) | \
GX_TRANSFER_SCALING(GX_TRANSFER_SCALE_NO))
typedef struct { float position[3]; float texcoord[2]; float normal[3]; } vertex;
static const vertex vertex_list[] =
{
// First face (PZ)
// First triangle
{ {-1.0f, -0.5f, -6.0f}, {0.0f, 0.0f}, {0.0f, 0.0f, +1.0f} },
{ {+1.0f, -0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, +1.0f} },
{ {+1.0f, -0.5f, -6.0f}, {1.0f, 0.0f}, {0.0f, 0.0f, +1.0f} },
// Second triangle
{ {+1.0f, -0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, +1.0f} },
{ {-1.0f, -0.5f, -6.0f}, {0.0f, 0.0f}, {0.0f, 0.0f, +1.0f} },
{ {-1.0f, -0.5f, +0.5f}, {0.0f, 1.0f}, {0.0f, 0.0f, +1.0f} },
};
#define vertex_list_count (sizeof(vertex_list)/sizeof(vertex_list[0]))
static DVLB_s* vshader_dvlb;
static shaderProgram_s program;
static int uLoc_projection, uLoc_modelView;
static int uLoc_lightVec, uLoc_lightHalfVec, uLoc_lightClr, uLoc_material;
static C3D_Mtx projection;
static C3D_Mtx material =
{
{
{ { 0.0f, 0.2f, 0.2f, 0.2f } }, // Ambient
{ { 0.0f, 0.4f, 0.4f, 0.4f } }, // Diffuse
{ { 0.0f, 0.8f, 0.8f, 0.8f } }, // Specular
{ { 1.0f, 0.0f, 0.0f, 0.0f } }, // Emission
}
};
static void* vbo_data;
static C3D_Tex logo_tex;
float bias = 0.0f;
bool linear = false;
static C3D_ProcTex pt;
static C3D_ProcTexLut pt_map;
static C3D_ProcTexLut pt_noise;
static C3D_ProcTexColorLut pt_clr;
static void sceneInit(void)
{
// Load the vertex shader, create a shader program and bind it
vshader_dvlb = DVLB_ParseFile((u32*)vshader_shbin, vshader_shbin_size);
shaderProgramInit(&program);
shaderProgramSetVsh(&program, &vshader_dvlb->DVLE[0]);
C3D_BindProgram(&program);
// Get the location of the uniforms
uLoc_projection = shaderInstanceGetUniformLocation(program.vertexShader, "projection");
uLoc_modelView = shaderInstanceGetUniformLocation(program.vertexShader, "modelView");
uLoc_lightVec = shaderInstanceGetUniformLocation(program.vertexShader, "lightVec");
uLoc_lightHalfVec = shaderInstanceGetUniformLocation(program.vertexShader, "lightHalfVec");
uLoc_lightClr = shaderInstanceGetUniformLocation(program.vertexShader, "lightClr");
uLoc_material = shaderInstanceGetUniformLocation(program.vertexShader, "material");
// Configure attributes for use with the vertex shader
C3D_AttrInfo* attrInfo = C3D_GetAttrInfo();
AttrInfo_Init(attrInfo);
AttrInfo_AddLoader(attrInfo, 0, GPU_FLOAT, 3); // v0=position
AttrInfo_AddLoader(attrInfo, 1, GPU_FLOAT, 2); // v1=texcoord
AttrInfo_AddLoader(attrInfo, 2, GPU_FLOAT, 3); // v2=normal
// Compute the projection matrix
Mtx_PerspTilt(&projection, C3D_AngleFromDegrees(80.0f), C3D_AspectRatioTop, 0.01f, 20.0f, false);
// Create the VBO (vertex buffer object)
vbo_data = linearAlloc(sizeof(vertex_list));
memcpy(vbo_data, vertex_list, sizeof(vertex_list));
// Configure buffers
C3D_BufInfo* bufInfo = C3D_GetBufInfo();
BufInfo_Init(bufInfo);
BufInfo_Add(bufInfo, vbo_data, sizeof(vertex), 3, 0x210);
C3D_ProcTexInit(&pt, 0, 128);
C3D_ProcTexClamp(&pt, GPU_PT_MIRRORED_REPEAT, GPU_PT_MIRRORED_REPEAT);
C3D_ProcTexCombiner(&pt, false, GPU_PT_ADD2, GPU_PT_ADD2);
float data[129];
int i;
for (i = 0; i <= 128; i ++)
{
float x = i/128.0f;
data[i] = fabsf(sinf(C3D_Angle(6*(x+0.125f)))); // 6*2 = 12 stripes
}
ProcTexLut_FromArray(&pt_map, data);
C3D_ProcTexLutBind(GPU_LUT_RGBMAP, &pt_map);
// Noise smooth step equation
for (i = 0; i <= 128; i ++)
{
float x = i/128.0f;
data[i] = x*x*(3-2*x);
}
ProcTexLut_FromArray(&pt_noise, data);
C3D_ProcTexLutBind(GPU_LUT_NOISE, &pt_noise);
u32 mipmap_color[8] = {
0xFFFF0000,
0xFF00FF00,
0xFF0000FF,
0xFFFFFF00,
0xFFFF00FF,
0xFF00FFFF,
0xFFFFFFFF,
0xFF000000,
};
u32* pcolor = pt_clr.color;
u32 width = 128;
for (u32 level = 0; level < 7; ++level, pcolor += width, width /= 2) {
for (u32 i = 0; i < width/2; ++i) {
pcolor[i] = mipmap_color[level];
}
for (u32 i = width/2; i < width; ++i) {
pcolor[i] = 0xFF888888;
}
}
memset(pt_clr.diff, 0, sizeof(pt_clr.diff));
C3D_ProcTexColorLutBind(&pt_clr);
// Configure the first fragment shading substage to blend the texture color with
// the vertex color (calculated by the vertex shader using a lighting algorithm)
// See https://www.opengl.org/sdk/docs/man2/xhtml/glTexEnv.xml for more insight
C3D_TexEnv* env = C3D_GetTexEnv(0);
C3D_TexEnvInit(env);
C3D_TexEnvSrc(env, C3D_Both, GPU_TEXTURE3, GPU_PRIMARY_COLOR, 0);
C3D_TexEnvFunc(env, C3D_Both, GPU_MODULATE);
}
static void sceneRender(void)
{
// Calculate the modelView matrix
C3D_Mtx modelView;
Mtx_Identity(&modelView);
Mtx_Translate(&modelView, 0.0, 0.0, -1.1, true);
// Update the uniforms
C3D_FVUnifMtx4x4(GPU_VERTEX_SHADER, uLoc_projection, &projection);
C3D_FVUnifMtx4x4(GPU_VERTEX_SHADER, uLoc_modelView, &modelView);
C3D_FVUnifMtx4x4(GPU_VERTEX_SHADER, uLoc_material, &material);
C3D_FVUnifSet(GPU_VERTEX_SHADER, uLoc_lightVec, 0.0f, 0.0f, -1.0f, 0.0f);
C3D_FVUnifSet(GPU_VERTEX_SHADER, uLoc_lightHalfVec, 0.0f, 0.0f, -1.0f, 0.0f);
C3D_FVUnifSet(GPU_VERTEX_SHADER, uLoc_lightClr, 1.0f, 1.0f, 1.0f, 1.0f);
C3D_ProcTexLodBias(&pt, bias);
C3D_ProcTexFilter(&pt, linear ? GPU_PT_NEAREST_MIP_LINEAR : GPU_PT_NEAREST_MIP_NEAREST);
C3D_ProcTexBind(0, &pt);
static float phase = 0;
C3D_ProcTexNoiseCoefs(&pt, C3D_ProcTex_UV, 0.1f, 0.3f, phase);
phase += 0.001f;
// Draw the VBO
C3D_DrawArrays(GPU_TRIANGLES, 0, vertex_list_count);
}
static void sceneExit(void)
{
// Free the texture
C3D_TexDelete(&logo_tex);
// Free the VBO
linearFree(vbo_data);
// Free the shader program
shaderProgramFree(&program);
DVLB_Free(vshader_dvlb);
}
int main()
{
// Initialize graphics
gfxInitDefault();
consoleInit(GFX_BOTTOM, NULL);
C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
// Initialize the render target
C3D_RenderTarget* target = C3D_RenderTargetCreate(240, 400, GPU_RB_RGBA8, GPU_RB_DEPTH24_STENCIL8);
C3D_RenderTargetSetOutput(target, GFX_TOP, GFX_LEFT, DISPLAY_TRANSFER_FLAGS);
// Initialize the scene
sceneInit();
// Main loop
while (aptMainLoop())
{
hidScanInput();
// Respond to user input
u32 kDown = hidKeysDown();
if (kDown & KEY_START)
break; // break in order to return to hbmenu
if (kDown & KEY_A) {
linear = !linear;
}
if (kDown & KEY_B) {
bias = 0;
}
if (kDown & KEY_X) {
bias += 0.2f;
}
if (kDown & KEY_Y) {
bias -= 0.2f;
}
// Render the scene
C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
C3D_RenderTargetClear(target, C3D_CLEAR_ALL, CLEAR_COLOR, 0);
C3D_FrameDrawOn(target);
sceneRender();
C3D_FrameEnd(0);
}
// Deinitialize the scene
sceneExit();
// Deinitialize graphics
C3D_Fini();
gfxExit();
return 0;
}
; Example PICA200 vertex shader
; Uniforms
.fvec projection[4], modelView[4]
.fvec lightVec, lightHalfVec, lightClr, material[4]
.alias mat_amb material[0]
.alias mat_dif material[1]
.alias mat_spe material[2]
.alias mat_emi material[3]
; Constants
.constf myconst(0.0, 1.0, -1.0, -0.5)
.alias zeros myconst.xxxx ; Vector full of zeros
.alias ones myconst.yyyy ; Vector full of ones
; Outputs
.out outpos position
.out outtc0 texcoord0
.out outclr color
; Inputs (defined as aliases for convenience)
.alias inpos v0
.alias intex v1
.alias innrm v2
.proc main
; Force the w component of inpos to be 1.0
mov r0.xyz, inpos
mov r0.w, ones
; r1 = modelView * inpos
dp4 r1.x, modelView[0], r0
dp4 r1.y, modelView[1], r0
dp4 r1.z, modelView[2], r0
dp4 r1.w, modelView[3], r0
; outpos = projection * r1
dp4 outpos.x, projection[0], r1
dp4 outpos.y, projection[1], r1
dp4 outpos.z, projection[2], r1
dp4 outpos.w, projection[3], r1
; outtex = intex
mov outtc0, intex
; Transform the normal vector with the modelView matrix
; r1 = normalize(modelView * innrm)
mov r0.xyz, innrm
mov r0.w, zeros
dp4 r1.x, modelView[0], r0
dp4 r1.y, modelView[1], r0
dp4 r1.z, modelView[2], r0
mov r1.w, zeros
dp3 r2, r1, r1 ; r2 = x^2+y^2+z^2 for each component
rsq r2, r2 ; r2 = 1/sqrt(r2) ''
mul r1, r2, r1 ; r1 = r1*r2
; Calculate the diffuse level (r0.x) and the shininess level (r0.y)
; r0.x = max(0, -(lightVec * r1))
; r0.y = max(0, (-lightHalfVec[i]) * r1) ^ 2
dp3 r0.x, lightVec, r1
add r0.x, zeros, -r0
dp3 r0.y, -lightHalfVec, r1
max r0, zeros, r0
mul r0.y, r0, r0
; Accumulate the vertex color in r1, initializing it to the emission color
mov r1, mat_emi
; r1 += specularColor * lightClr * shininessLevel
mul r2, lightClr, r0.yyyy
mad r1, r2, mat_spe, r1
; r1 += diffuseColor * lightClr * diffuseLevel
mul r2, lightClr, r0.xxxx
mad r1, r2, mat_dif, r1
; r1 += ambientColor * lightClr
mov r2, lightClr
mad r1, r2, mat_amb, r1
; outclr = clamp r1 to [0,1]
min outclr, ones, r1
; We're finished
end
.end
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