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#include <3ds.h> | |
#include <citro3d.h> | |
#include <string.h> | |
#include <stdio.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 x, y, z; } vertex; | |
static const vertex vertex_list[] = | |
{ | |
{ 200.0f, 200.0f, 0.5f }, | |
{ 100.0f, 40.0f, 0.5f }, | |
{ 300.0f, 40.0f, 0.5f }, | |
}; | |
#define vertex_list_count (sizeof(vertex_list)/sizeof(vertex_list[0])) | |
static DVLB_s* vshader_dvlb; | |
static shaderProgram_s program; | |
static int uLoc_projection; | |
static C3D_Mtx projection; | |
static void* vbo_data; | |
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"); | |
// 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_AddFixed(attrInfo, 1); // v1=color | |
// Set the fixed attribute (color) to solid white | |
C3D_FixedAttribSet(1, 1.0, 1.0, 1.0, 1.0); | |
// Compute the projection matrix | |
Mtx_OrthoTilt(&projection, 0.0, 400.0, 0.0, 240.0, 0.0, 1.0, true); | |
// Create the VBO (vertex buffer object) | |
vbo_data = linearAlloc(sizeof(vertex_list)*2000); | |
for (int i = 0; i < 2000; i++) | |
memcpy((u8*)vbo_data + i * sizeof(vertex_list), vertex_list, sizeof(vertex_list)); | |
// Configure buffers | |
C3D_BufInfo* bufInfo = C3D_GetBufInfo(); | |
BufInfo_Init(bufInfo); | |
BufInfo_Add(bufInfo, vbo_data, sizeof(vertex), 1, 0x0); | |
// Configure the first fragment shading substage to just pass through the vertex color | |
// 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_PRIMARY_COLOR, 0, 0); | |
C3D_TexEnvFunc(env, C3D_Both, GPU_REPLACE); | |
} | |
bool white = false; | |
static void sceneRender(void) | |
{ | |
C3D_FixedAttribSet(1, white ? 1.f : 0.f, 1.0, 1.0, 1.0); | |
white ^= true; | |
// Update the uniforms | |
C3D_FVUnifMtx4x4(GPU_VERTEX_SHADER, uLoc_projection, &projection); | |
// Draw the VBO | |
C3D_DrawArrays(GPU_TRIANGLES, 0, vertex_list_count*2000); | |
} | |
static void sceneExit(void) | |
{ | |
// Free the VBO | |
linearFree(vbo_data); | |
// Free the shader program | |
shaderProgramFree(&program); | |
DVLB_Free(vshader_dvlb); | |
} | |
int main() | |
{ | |
// Initialize graphics | |
gfxInitDefault(); | |
C3D_Init(C3D_DEFAULT_CMDBUF_SIZE); | |
consoleInit(GFX_BOTTOM, NULL); | |
// 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 | |
printf("\x1b[2;1HCPU: %6.2fms\x1b[K", C3D_GetProcessingTime()); | |
printf("\x1b[3;1HGPU: %6.2fms\x1b[K", C3D_GetDrawingTime()); | |
// 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; | |
} |
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