mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-12-01 11:56:58 -05:00
343 lines
8.1 KiB
C++
343 lines
8.1 KiB
C++
/*
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* Copyright 2011-2013 Branimir Karadzic. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#include <bgfx.h>
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#include <bx/bx.h>
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#include <bx/timer.h>
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#include <bx/uint32_t.h>
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#include "../common/entry.h"
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#include "../common/dbg.h"
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#include "../common/math.h"
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#include "../common/processevents.h"
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#include <stdio.h>
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#include <string.h>
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struct PosColorVertex
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{
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float m_x;
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float m_y;
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float m_z;
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float m_u;
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float m_v;
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float m_w;
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};
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static bgfx::VertexDecl s_PosTexcoordDecl;
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static PosColorVertex s_cubeVertices[24] =
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{
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{-1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f },
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{ 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f },
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{-1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f },
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{ 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f },
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{-1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f },
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{ 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f },
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{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f },
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{ 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f },
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{-1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f },
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{-1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f },
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{-1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f },
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{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f },
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{ 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f },
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{ 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f },
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{ 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f },
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{ 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f },
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{-1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f },
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{ 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f },
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{-1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f },
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{ 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f },
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{-1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f },
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{-1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f },
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{ 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f },
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{ 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f },
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};
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static const uint16_t s_cubeIndices[36] =
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{
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0, 2, 1, // 0
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1, 2, 3,
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4, 5, 6, // 2
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5, 7, 6,
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8, 9, 10, // 4
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9, 11, 10,
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12, 13, 14, // 6
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14, 13, 15,
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16, 17, 18, // 8
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18, 17, 19,
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20, 21, 22, // 10
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21, 23, 22,
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};
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static const char* s_shaderPath = NULL;
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static void shaderFilePath(char* _out, const char* _name)
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{
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strcpy(_out, s_shaderPath);
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strcat(_out, _name);
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strcat(_out, ".bin");
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}
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long int fsize(FILE* _file)
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{
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long int pos = ftell(_file);
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fseek(_file, 0L, SEEK_END);
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long int size = ftell(_file);
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fseek(_file, pos, SEEK_SET);
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return size;
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}
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static const bgfx::Memory* load(const char* _filePath)
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{
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FILE* file = fopen(_filePath, "rb");
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if (NULL != file)
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{
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uint32_t size = (uint32_t)fsize(file);
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const bgfx::Memory* mem = bgfx::alloc(size+1);
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size_t ignore = fread(mem->data, 1, size, file);
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BX_UNUSED(ignore);
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fclose(file);
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mem->data[mem->size-1] = '\0';
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return mem;
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}
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return NULL;
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}
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static const bgfx::Memory* loadShader(const char* _name)
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{
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char filePath[512];
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shaderFilePath(filePath, _name);
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return load(filePath);
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}
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int _main_(int _argc, char** _argv)
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{
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uint32_t width = 1280;
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uint32_t height = 720;
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uint32_t debug = BGFX_DEBUG_TEXT;
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bgfx::init();
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bgfx::reset(width, height);
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// Enable debug text.
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bgfx::setDebug(debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR_BIT|BGFX_CLEAR_DEPTH_BIT
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Setup root path for binary shaders. Shader binaries are different
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// for each renderer.
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switch (bgfx::getRendererType() )
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{
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default:
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case bgfx::RendererType::Direct3D9:
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s_shaderPath = "shaders/dx9/";
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break;
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case bgfx::RendererType::Direct3D11:
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s_shaderPath = "shaders/dx11/";
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break;
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case bgfx::RendererType::OpenGL:
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s_shaderPath = "shaders/glsl/";
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break;
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case bgfx::RendererType::OpenGLES2:
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case bgfx::RendererType::OpenGLES3:
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s_shaderPath = "shaders/gles/";
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break;
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}
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// Create vertex stream declaration.
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s_PosTexcoordDecl.begin();
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s_PosTexcoordDecl.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float);
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s_PosTexcoordDecl.add(bgfx::Attrib::TexCoord0, 3, bgfx::AttribType::Float);
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s_PosTexcoordDecl.end();
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const bgfx::Memory* mem;
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// Create static vertex buffer.
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mem = bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) );
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bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(mem, s_PosTexcoordDecl);
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// Create static index buffer.
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mem = bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) );
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bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(mem);
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// Create texture sampler uniforms.
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bgfx::UniformHandle u_texCube = bgfx::createUniform("u_texCube", bgfx::UniformType::Uniform1iv);
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// Load vertex shader.
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mem = loadShader("vs_update");
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bgfx::VertexShaderHandle vsh = bgfx::createVertexShader(mem);
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// Load fragment shader.
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mem = loadShader("fs_update");
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bgfx::FragmentShaderHandle fsh = bgfx::createFragmentShader(mem);
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// Create program from shaders.
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bgfx::ProgramHandle program = bgfx::createProgram(vsh, fsh);
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// We can destroy vertex and fragment shader here since
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// their reference is kept inside bgfx after calling createProgram.
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// Vertex and fragment shader will be destroyed once program is
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// destroyed.
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bgfx::destroyVertexShader(vsh);
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bgfx::destroyFragmentShader(fsh);
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uint32_t blockSide = 0;
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uint32_t blockX = 0;
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uint32_t blockY = 0;
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const uint32_t blockWidth = 8;
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const uint32_t blockHeight = 8;
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const uint32_t textureSide = 256;
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bgfx::TextureHandle textureCube =
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bgfx::createTextureCube(6
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, textureSide
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, 1
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, bgfx::TextureFormat::BGRA8
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, BGFX_TEXTURE_MIN_POINT|BGFX_TEXTURE_MAG_POINT|BGFX_TEXTURE_MIP_POINT
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);
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bgfx::TextureInfo ti;
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bgfx::calcTextureSize(ti, blockWidth, blockHeight, 1, 1, bgfx::TextureFormat::BGRA8);
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uint8_t rr = rand()%255;
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uint8_t gg = rand()%255;
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uint8_t bb = rand()%255;
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int64_t updateTime = 0;
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while (!processEvents(width, height, debug) )
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{
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, width, height);
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to view 0.
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bgfx::submit(0);
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const int64_t freq = bx::getHPFrequency();
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const double toMs = 1000.0/double(freq);
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// Use debug font to print information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/08-update");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Updating textures.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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if (now > updateTime)
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{
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// updateTime = now + freq/10;
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const bgfx::Memory* mem = bgfx::alloc(ti.storageSize);
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uint8_t* data = (uint8_t*)mem->data;
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for (uint32_t ii = 0, num = ti.storageSize*8/ti.bitsPerPixel; ii < num; ++ii)
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{
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data[0] = bb;
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data[1] = rr;
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data[2] = gg;
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data[3] = 0xff;
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data += 4;
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}
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bgfx::updateTextureCube(textureCube, blockSide, 0, blockX, blockY, blockWidth, blockHeight, mem);
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blockX += 8;
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if (blockX >= textureSide)
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{
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blockX = 0;
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blockY += 8;
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if (blockY >= textureSide)
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{
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rr = rand()%255;
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gg = rand()%255;
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bb = rand()%255;
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blockY = 0;
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++blockSide;
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if (blockSide > 5)
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{
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blockSide = 0;
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}
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}
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}
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}
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float at[3] = { 0.0f, 0.0f, 0.0f };
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float eye[3] = { 0.0f, 0.0f, -5.0f };
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float view[16];
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float proj[16];
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mtxLookAt(view, eye, at);
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mtxProj(proj, 60.0f, 16.0f/9.0f, 0.1f, 100.0f);
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// Set view and projection matrix for view 0.
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bgfx::setViewTransform(0, view, proj);
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float time = (float)(bx::getHPCounter()/double(bx::getHPFrequency() ) );
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float mtx[16];
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mtxRotateXY(mtx, time, time*0.37f);
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// Set model matrix for rendering.
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bgfx::setTransform(mtx);
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// Set vertex and fragment shaders.
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bgfx::setProgram(program);
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// Set vertex and index buffer.
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bgfx::setVertexBuffer(vbh);
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bgfx::setIndexBuffer(ibh);
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// Bind texture.
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bgfx::setTexture(0, u_texCube, textureCube);
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// Set render states.
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bgfx::setState(BGFX_STATE_RGB_WRITE
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|BGFX_STATE_DEPTH_WRITE
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|BGFX_STATE_DEPTH_TEST_LESS
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);
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// Submit primitive for rendering to view 0.
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bgfx::submit(0);
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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}
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// Cleanup.
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bgfx::destroyIndexBuffer(ibh);
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bgfx::destroyVertexBuffer(vbh);
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bgfx::destroyProgram(program);
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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