mirror of
https://github.com/haya3218/SDfmL.git
synced 2024-08-14 23:57:09 +00:00
*very* experimental shader support
havent tested it yet, beware
This commit is contained in:
/nick haya
parent
e4dc4a8331
commit
d2be0d9e2b
3 changed files with 221 additions and 2 deletions
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@ -35,6 +35,7 @@
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#include "guicon.h"
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#include "sdfml/music.hpp"
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#include "sdfml/shader.hpp"
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#include "SDL_gpu/SDL_gpu.h"
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@ -100,6 +101,8 @@ inline std::string _GetCurrentDirectory()
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namespace sdfml {
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static double elapsed;
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inline int llog(string prefix, string msg, lLOG_TYPE type = NORMAL, string file = "???.cpp", int line = 0) {
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clock_t now = std::clock();
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@ -187,6 +190,8 @@ namespace sdfml {
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Vector3<Uint8> color;
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ShaderProg shader;
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virtual void create(int x, int y, string path) {
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this->x = x;
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this->y = y;
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@ -198,6 +203,9 @@ namespace sdfml {
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color.g = 255;
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color.b = 255;
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}
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virtual void addShader(std::string path) {
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shader.loadShader(path, FRAGMENT, mContext.gpu_render, _tex_gpu);
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}
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GPU_Rect *r;
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virtual void update(float elapsed) {
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_x = x+offset.x;
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@ -206,14 +214,17 @@ namespace sdfml {
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r = &_src_rect;
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if (r->w == 0)
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r = NULL;
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shader.updateShader(static_cast<float>(sdfml::elapsed));
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GPU_Rect dst = {static_cast<float>(_x-_camera->x), static_cast<float>(_y-_camera->y), width*scale.x, height*scale.y};
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GPU_BlitRectX(_tex_gpu, r, mContext.gpu_render, &dst, angle, NULL, NULL, GPU_FLIP_NONE);
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shader.postUpdate();
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}
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virtual void destroy() {
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_x = 0;
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_y = 0;
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_w = 0;
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_h = 0;
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shader.freeShader();
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GPU_FreeImage(_tex_gpu);
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}
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virtual void updateCamera(SDL_Rect* camera) {
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@ -466,8 +477,6 @@ namespace sdfml {
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return FRAMERATE*time;
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}
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static double elapsed;
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inline int update() {
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int lastUpdate = SDL_GetTicks();
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bool run = true;
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179
src/sdfml/shader.cpp
Normal file
179
src/sdfml/shader.cpp
Normal file
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@ -0,0 +1,179 @@
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#include "shader.hpp"
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// Loads a shader and prepends version/compatibility info before compiling it.
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// Normally, you can just use GPU_LoadShader() for shader source files or GPU_CompileShader() for strings.
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// However, some hardware (certain ATI/AMD cards) does not let you put non-#version preprocessing at the top of the file.
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// Therefore, I need to prepend the version info here so I can support both GLSL and GLSLES with one shader file.
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Uint32 loadShaderFromFile(GPU_ShaderEnum shader_type, const char* filename)
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{
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SDL_RWops* rwops;
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Uint32 shader;
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char* source;
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int header_size, file_size;
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const char* header = "";
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GPU_Renderer* renderer = GPU_GetCurrentRenderer();
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// Open file
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rwops = SDL_RWFromFile(filename, "rb");
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if(rwops == NULL)
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{
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GPU_PushErrorCode("load_shader", GPU_ERROR_FILE_NOT_FOUND, "Shader file \"%s\" not found", filename);
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return 0;
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}
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// Get file size
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file_size = SDL_RWseek(rwops, 0, SEEK_END);
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SDL_RWseek(rwops, 0, SEEK_SET);
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// Get size from header
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if(renderer->shader_language == GPU_LANGUAGE_GLSL)
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{
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if(renderer->max_shader_version >= 120)
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header = "#version 120\n";
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else
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header = "#version 110\n"; // Maybe this is good enough?
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}
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else if(renderer->shader_language == GPU_LANGUAGE_GLSLES)
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header = "#version 100\nprecision mediump int;\nprecision mediump float;\n";
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header_size = strlen(header);
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// Allocate source buffer
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source = (char*)malloc(sizeof(char)*(header_size + file_size + 1));
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// Prepend header
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strcpy(source, header);
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// Read in source code
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SDL_RWread(rwops, source + strlen(source), 1, file_size);
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source[header_size + file_size] = '\0';
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// Compile the shader
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shader = GPU_CompileShader(shader_type, source);
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// Clean up
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free(source);
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SDL_RWclose(rwops);
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return shader;
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}
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Uint32 _loadShader(GPU_ShaderEnum shader_type, std::string source) {
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Uint32 shader;
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std::string header = "";
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GPU_Renderer* renderer = GPU_GetCurrentRenderer();
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// Get size from header
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if(renderer->shader_language == GPU_LANGUAGE_GLSL)
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{
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if(renderer->max_shader_version >= 120)
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header = "#version 120\n";
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else
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header = "#version 110\n"; // Maybe this is good enough?
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}
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else if(renderer->shader_language == GPU_LANGUAGE_GLSLES)
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header = "#version 100\nprecision mediump int;\nprecision mediump float;\n";
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std::string final_source = header + source;
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// Compile the shader
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shader = GPU_CompileShader(shader_type, final_source.c_str());
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return shader;
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}
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void sdfml::ShaderProg::loadShader(std::string path, SHADER_TYPE shader_type, GPU_Target* target, GPU_Image* image) {
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Uint32 s;
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switch (shader_type) {
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case FRAGMENT:
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s = loadShaderFromFile(GPU_FRAGMENT_SHADER, path.c_str());
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frag_int = GPU_LinkShaderProgram(s);
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fragment = GPU_LoadShaderBlock(frag_int, "gpu_Vertex", "gpu_TexCoord", "gpu_Color", "gpu_ModelViewProjectionMatrix");
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GPU_ActivateShaderProgram(frag_int, &fragment);
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if(image != NULL)
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{
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "resolution_x"), image->w);
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "resolution_y"), image->h);
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}
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "screen_w"), target->w);
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "screen_h"), target->h);
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iTime = GPU_GetUniformLocation(frag_int, "time");
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break;
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case VERTEX:
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s = loadShaderFromFile(GPU_VERTEX_SHADER, path.c_str());
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vert_int = GPU_LinkShaderProgram(s);
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vertex = GPU_LoadShaderBlock(vert_int, "gpu_Vertex", "gpu_TexCoord", "gpu_Color", "gpu_ModelViewProjectionMatrix");
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GPU_ActivateShaderProgram(vert_int, &vertex);
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if(image != NULL)
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{
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "resolution_x"), image->w);
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "resolution_y"), image->h);
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}
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "screen_w"), target->w);
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "screen_h"), target->h);
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iTime = GPU_GetUniformLocation(vert_int, "time");
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break;
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}
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}
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void sdfml::ShaderProg::loadShaderFromString(std::string source, SHADER_TYPE shader_type, GPU_Target* target, GPU_Image* image) {
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Uint32 s;
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switch (shader_type) {
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case FRAGMENT:
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s = _loadShader(GPU_FRAGMENT_SHADER, source);
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frag_int = GPU_LinkShaderProgram(s);
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fragment = GPU_LoadShaderBlock(frag_int, "gpu_Vertex", "gpu_TexCoord", "gpu_Color", "gpu_ModelViewProjectionMatrix");
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GPU_ActivateShaderProgram(frag_int, &fragment);
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if(image != NULL)
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{
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "resolution_x"), image->w);
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "resolution_y"), image->h);
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}
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "screen_w"), target->w);
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GPU_SetUniformf(GPU_GetUniformLocation(frag_int, "screen_h"), target->h);
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iTime = GPU_GetUniformLocation(frag_int, "time");
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break;
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case VERTEX:
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s = _loadShader(GPU_VERTEX_SHADER, source);
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vert_int = GPU_LinkShaderProgram(s);
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vertex = GPU_LoadShaderBlock(vert_int, "gpu_Vertex", "gpu_TexCoord", "gpu_Color", "gpu_ModelViewProjectionMatrix");
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GPU_ActivateShaderProgram(vert_int, &vertex);
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if(image != NULL)
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{
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "resolution_x"), image->w);
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "resolution_y"), image->h);
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}
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "screen_w"), target->w);
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GPU_SetUniformf(GPU_GetUniformLocation(vert_int, "screen_h"), target->h);
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iTime = GPU_GetUniformLocation(vert_int, "time");
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break;
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}
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}
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void sdfml::ShaderProg::freeShader() {
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if (frag_int != NULL)
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GPU_FreeShaderProgram(frag_int);
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if (vert_int != NULL)
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GPU_FreeShaderProgram(vert_int);
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}
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void sdfml::ShaderProg::updateShader(float elapsed) {
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if (frag_int != NULL)
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GPU_ActivateShaderProgram(frag_int, &fragment);
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if (vert_int != NULL)
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GPU_ActivateShaderProgram(vert_int, &vertex);
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if (frag_int != NULL || vert_int != NULL)
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GPU_SetUniformf(iTime, elapsed);
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}
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void sdfml::ShaderProg::postUpdate() {
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GPU_ActivateShaderProgram(0, NULL);
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}
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31
src/sdfml/shader.hpp
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31
src/sdfml/shader.hpp
Normal file
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#ifndef _SHADER_HPP
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#define _SHADER_HPP
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#include "../SDL2/SDL.h"
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#include "../SDL_gpu/SDL_gpu.h"
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#include <string>
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enum SHADER_TYPE {
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FRAGMENT,
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VERTEX
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};
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namespace sdfml {
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class ShaderProg {
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public:
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GPU_ShaderBlock fragment;
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GPU_ShaderBlock vertex;
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void loadShader(std::string path, SHADER_TYPE shader_type, GPU_Target* target, GPU_Image* image);
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void loadShaderFromString(std::string source, SHADER_TYPE shader_type, GPU_Target* target, GPU_Image* image);
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void freeShader();
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void updateShader(float elapsed);
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void postUpdate();
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protected:
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Uint32 frag_int = NULL;
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Uint32 vert_int = NULL;
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int iTime = 0;
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};
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}
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#endif
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