path: root/src/IOGfxSurfaceGL2.cpp

/** * Texture handler for OpenGL (ES) 2 * Copyright (C) 2015 Sylvain Beucler * This file is part of GNU FreeDink * GNU FreeDink is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * GNU FreeDink is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public * License along with GNU FreeDink. If not, see * <http://www.gnu.org/licenses/>. */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include"IOGfxSurfaceGL2.h"#include"SDL.h"#include <glm/glm.hpp>#include <glm/gtc/matrix_transform.hpp>#include <glm/gtc/type_ptr.hpp>#include"log.h"#include"IOGfxDisplayGL2.h"#include"IOGfxGLFuncs.h"#include"ImageLoader.h"/* GFX_ref_pal */// TODO: break depIOGfxSurfaceGL2::IOGfxSurfaceGL2(IOGfxDisplayGL2* display, GLuint texture,int w,int h, SDL_Color colorkey):IOGfxSurface(w, h),display(display),texture(texture),colorkey(colorkey) { fbo =0;}IOGfxSurfaceGL2::~IOGfxSurfaceGL2() { IOGfxGLFuncs* gl = display->gl; gl->DeleteTextures(1, &texture); gl->DeleteFramebuffers(1, &fbo);}/** * Lazy GL framebuffer creation * Only necessary for the few target textures (backbuffer, background...) */boolIOGfxSurfaceGL2::bindAsFramebuffer() { IOGfxGLFuncs* gl = display->gl;if(fbo ==0) {// bind this texture as framebuffer gl->GenFramebuffers(1, &fbo); gl->BindFramebuffer(GL_FRAMEBUFFER, fbo); gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,this->texture,0); GLenum status;if((status = gl->CheckFramebufferStatus(GL_FRAMEBUFFER)) != GL_FRAMEBUFFER_COMPLETE) {log_error("glCheckFramebufferStatus: error 0x%x", status);switch(status) {case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:log_error("GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT");break;case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:log_error("GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS");break;case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:log_error("GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");break;case GL_FRAMEBUFFER_UNSUPPORTED:log_error("GL_FRAMEBUFFER_UNSUPPORTED");break;}return false;}}else{ gl->BindFramebuffer(GL_FRAMEBUFFER, fbo);}return true;}/* Function specifically made for Dink'C fill_screen() */voidIOGfxSurfaceGL2::fill_screen(int num, SDL_Color* palette) {fillRect(NULL, palette[num].r, palette[num].g, palette[num].b);// TODO: check indexed mode + palette change}intIOGfxSurfaceGL2::fillRect(const SDL_Rect *dstrect, Uint8 r, Uint8 g, Uint8 b) { SDL_Rect dstrect_if_not_null;if(dstrect == NULL) { dstrect_if_not_null.x =0; dstrect_if_not_null.y =0; dstrect_if_not_null.w = w; dstrect_if_not_null.h = h; dstrect = &dstrect_if_not_null;}if(!display->truecolor) { SDL_PixelFormat fmt; fmt.palette =SDL_AllocPalette(256);memcpy(fmt.palette->colors, GFX_ref_pal,sizeof(GFX_ref_pal)); Uint8 i =SDL_MapRGB(&fmt, r,g,b); r = g = b = i;} IOGfxGLFuncs* gl = display->gl; display->gl->UseProgram(display->fillRect->program); display->setVertexAttrib(display->fillRect, display->fillRect->attributes["v_coord"], display->vboSpriteVertices,4);glm::mat4 projection =glm::ortho(0.0f,1.0f*display->w,0.0f,1.0f*display->h);glm::mat4 m_transform; m_transform =glm::translate(glm::mat4(1.0f),glm::vec3(dstrect->x,dstrect->y,0.0))*glm::scale(glm::mat4(1.0f),glm::vec3(dstrect->w, dstrect->h,0.0));glm::mat4 mvp = projection * m_transform;// * view * model * anim; gl->UniformMatrix4fv(display->fillRect->uniforms["mvp"],1, GL_FALSE,glm::value_ptr(mvp)); gl->Uniform4f(display->fillRect->uniforms["color"], r/255.0,g/255.0,b/255.0,1.0);/* Push each element in buffer_vertices to the vertex shader */bindAsFramebuffer(); gl->DrawArrays(GL_TRIANGLE_STRIP,0,4);// gl->DisableVertexAttribArray(display->fillRect->attributes["v_coord"]);return0;}intIOGfxSurfaceGL2::internalBlit(IOGfxSurface* src,const SDL_Rect* srcrect, SDL_Rect* dstrect,bool useColorKey) {if(src == NULL)returnSDL_SetError("IOGfxSurfaceGL2::blitStretch: passed a NULL surface");if(dstrect == NULL)returnSDL_SetError("IOGfxSurfaceGL2::blitStretch: passed a NULL dstrect"); IOGfxSurfaceGL2* src_surf =dynamic_cast<IOGfxSurfaceGL2*>(src); GLuint src_tex = src_surf->texture; IOGfxGLFuncs* gl = display->gl; GLuint vbo;if(srcrect == NULL || (srcrect->x ==0&& srcrect->y ==0&& srcrect->w == src_surf->w && srcrect->h == src_surf->h)) { vbo = display->vboSpriteTexcoords;}else{float x1 =1.0* srcrect->x / src_surf->w;float y1 =1.0* srcrect->y / src_surf->h;float x2 =1.0* (srcrect->x+srcrect->w) / src_surf->w;float y2 =1.0* (srcrect->y+srcrect->h) / src_surf->h; GLfloat croppedSpriteTexcoords[] = { x1, y1, x2, y1, x1, y2, x2, y2,}; gl->BindBuffer(GL_ARRAY_BUFFER, display->vboCroppedSpriteTexcoords); gl->BufferData(GL_ARRAY_BUFFER,sizeof(croppedSpriteTexcoords), croppedSpriteTexcoords, GL_STATIC_DRAW); vbo = display->vboCroppedSpriteTexcoords;} gl->UseProgram(display->blit->program); display->setVertexAttrib(display->blit, display->blit->attributes["v_coord"], display->vboSpriteVertices,4); display->setVertexAttrib(display->blit, display->blit->attributes["v_texcoord"], vbo,2); gl->ActiveTexture(GL_TEXTURE0); gl->Uniform1i(display->blit->uniforms["texture"],/*GL_TEXTURE*/0); gl->BindTexture(GL_TEXTURE_2D, src_tex);glm::mat4 projection =glm::ortho(0.0f,1.0f*display->w,0.0f,1.0f*display->h);glm::mat4 m_transform; m_transform =glm::translate(glm::mat4(1.0f),glm::vec3(dstrect->x,dstrect->y,0.0))*glm::scale(glm::mat4(1.0f),glm::vec3(dstrect->w, dstrect->h,0.0));glm::mat4 mvp = projection * m_transform;// * view * model * anim; gl->UniformMatrix4fv(display->blit->uniforms["mvp"],1, GL_FALSE,glm::value_ptr(mvp));if(useColorKey && src_surf->colorkey.a == SDL_ALPHA_TRANSPARENT) gl->Uniform3f(display->blit->uniforms["colorkey"], src_surf->colorkey.r/255.0, src_surf->colorkey.g/255.0, src_surf->colorkey.b/255.0);else gl->Uniform3f(display->blit->uniforms["colorkey"], -1,-1,-1);/* Push each element in buffer_vertices to the vertex shader */bindAsFramebuffer(); gl->DrawArrays(GL_TRIANGLE_STRIP,0,4);// gl->DisableVertexAttribArray(display->blit->attributes["v_coord"]);// gl->DisableVertexAttribArray(display->blit->attributes["v_texcoord"]);return0;}intIOGfxSurfaceGL2::blit(IOGfxSurface* src,const SDL_Rect* srcrect, SDL_Rect* dstrect) {if(src == NULL)returnSDL_SetError("IOGfxSurfaceGL2::blit: passed a NULL surface"); IOGfxSurfaceGL2* src_surf =dynamic_cast<IOGfxSurfaceGL2*>(src); SDL_Rect dstrect_if_not_null;if(dstrect == NULL) { dstrect = &dstrect_if_not_null; dstrect->x =0; dstrect->y =0;}// Force no-stretch blitif(srcrect == NULL) { dstrect->w = src_surf->w; dstrect->h = src_surf->h;}else{ dstrect->w = srcrect->w; dstrect->h = srcrect->h;}returninternalBlit(src, srcrect, dstrect,true);}intIOGfxSurfaceGL2::blitStretch(IOGfxSurface* src,const SDL_Rect* srcrect, SDL_Rect* dstrect) {returninternalBlit(src, srcrect, dstrect,true);}intIOGfxSurfaceGL2::blitNoColorKey(IOGfxSurface* src,const SDL_Rect* srcrect, SDL_Rect* dstrect) {if(src == NULL)returnSDL_SetError("IOGfxSurfaceGL2::blitStretch: passed a NULL surface"); IOGfxSurfaceGL2* src_surf =dynamic_cast<IOGfxSurfaceGL2*>(src); SDL_Rect dstrect_if_not_null;if(dstrect == NULL) { dstrect = &dstrect_if_not_null; dstrect->x =0; dstrect->y =0;}// Force no-stretch blitif(srcrect == NULL) { dstrect->w = src_surf->w; dstrect->h = src_surf->h;}else{ dstrect->w = srcrect->w; dstrect->h = srcrect->h;}returninternalBlit(src, srcrect, dstrect,false);} SDL_Surface*IOGfxSurfaceGL2::screenshot() { IOGfxGLFuncs* gl = display->gl;bindAsFramebuffer();// assume 4-bytes alignment SDL_Surface* image =SDL_CreateRGBSurface(0, w, h,32,#if SDL_BYTEORDER == SDL_BIG_ENDIAN0xff000000,0x00ff0000,0x0000ff00,0x000000ff#else0x000000ff,0x0000ff00,0x00ff0000,0xff000000#endif);unsigned char* pixels = (unsigned char*)image->pixels; gl->ReadPixels(0,0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);// Don't flip vertically - textures were uploaded OpenGL-reversed alreadyreturn image;}unsigned intIOGfxSurfaceGL2::getMemUsage() {// TODOreturn0;}