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Sketched out a quick class for rendering to texture.

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This commit is contained in:
Thomas Harte 2016-02-07 15:42:02 -05:00
parent 2e3ba6bbb2
commit 602327cd9d
5 changed files with 104 additions and 3 deletions
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8
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -15,6 +15,7 @@
4B14145E1B5887AA00E04248 /* CPU6502AllRAM.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B1414591B58879D00E04248 /* CPU6502AllRAM.cpp */; };
4B1414601B58885000E04248 /* WolfgangLorenzTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B14145F1B58885000E04248 /* WolfgangLorenzTests.swift */; };
4B1414621B58888700E04248 /* KlausDormannTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B1414611B58888700E04248 /* KlausDormannTests.swift */; };
4B2039941C67E20B001375C3 /* TextureTarget.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B2039921C67E20B001375C3 /* TextureTarget.cpp */; };
4B2409551C45AB05004DA684 /* Speaker.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B2409531C45AB05004DA684 /* Speaker.cpp */; };
4B2E2D951C399D1200138695 /* ElectronDocument.xib in Resources */ = {isa = PBXBuildFile; fileRef = 4B2E2D931C399D1200138695 /* ElectronDocument.xib */; };
4B2E2D9A1C3A06EC00138695 /* Atari2600.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B2E2D971C3A06EC00138695 /* Atari2600.cpp */; };
@ -340,6 +341,9 @@
4B14145A1B58879D00E04248 /* CPU6502AllRAM.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CPU6502AllRAM.hpp; sourceTree = "<group>"; };
4B14145F1B58885000E04248 /* WolfgangLorenzTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = WolfgangLorenzTests.swift; sourceTree = "<group>"; };
4B1414611B58888700E04248 /* KlausDormannTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = KlausDormannTests.swift; sourceTree = "<group>"; };
4B2039921C67E20B001375C3 /* TextureTarget.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = TextureTarget.cpp; sourceTree = "<group>"; };
4B2039931C67E20B001375C3 /* TextureTarget.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = TextureTarget.hpp; sourceTree = "<group>"; };
4B2039951C67E2A3001375C3 /* OpenGL.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = OpenGL.h; sourceTree = "<group>"; };
4B2409531C45AB05004DA684 /* Speaker.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Speaker.cpp; path = ../../Outputs/Speaker.cpp; sourceTree = "<group>"; };
4B2409541C45AB05004DA684 /* Speaker.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = Speaker.hpp; path = ../../Outputs/Speaker.hpp; sourceTree = "<group>"; };
4B24095A1C45DF85004DA684 /* Stepper.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Stepper.hpp; sourceTree = "<group>"; };
@ -690,6 +694,9 @@
4B0CCC441C62D0B3001CAC5F /* CRTFrame.h */,
4B0CCC461C62D1A8001CAC5F /* CRTOpenGL.cpp */,
4B7BFEFD1C6446EF00089C1C /* CRTFrameBuilder.cpp */,
4B2039921C67E20B001375C3 /* TextureTarget.cpp */,
4B2039931C67E20B001375C3 /* TextureTarget.hpp */,
4B2039951C67E2A3001375C3 /* OpenGL.h */,
);
name = CRT;
path = ../../Outputs/CRT;
@ -1608,6 +1615,7 @@
4B55CE4B1C3B3B0C0093A61B /* CSAtari2600.mm in Sources */,
4B55CE581C3B7D360093A61B /* Atari2600Document.swift in Sources */,
4B0CCC471C62D1A8001CAC5F /* CRTOpenGL.cpp in Sources */,
4B2039941C67E20B001375C3 /* TextureTarget.cpp in Sources */,
4B0EBFB81C487F2F00A11F35 /* AudioQueue.m in Sources */,
4B7BFEFE1C6446EF00089C1C /* CRTFrameBuilder.cpp in Sources */,
4B55CE5F1C3B7D960093A61B /* MachineDocument.swift in Sources */,

7
Outputs/CRT/CRTOpenGL.cpp
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@ -9,9 +9,7 @@
#include "CRT.hpp"
#include <stdlib.h>
// TODO: figure out correct include paths for other platforms.
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl3.h>
#include "OpenGL.h"
using namespace Outputs;
@ -90,6 +88,9 @@ void CRT::draw_frame(int output_width, int output_height, bool only_if_dirty)
{
_current_frame_mutex->lock();
GLint defaultFramebuffer;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFramebuffer);
if(!_current_frame && !only_if_dirty)
{
glClear(GL_COLOR_BUFFER_BIT);

16
Outputs/CRT/OpenGL.h Normal file
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@ -0,0 +1,16 @@
//
// OpenGL.h
// Clock Signal
//
// Created by Thomas Harte on 07/02/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#ifndef OpenGL_h
#define OpenGL_h
// TODO: figure out correct include paths for other platforms.
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl3.h>
#endif /* OpenGL_h */

46
Outputs/CRT/TextureTarget.cpp Normal file
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@ -0,0 +1,46 @@
//
// TextureTarget.cpp
// Clock Signal
//
// Created by Thomas Harte on 07/02/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#include "TextureTarget.hpp"
using namespace OpenGL;
TextureTarget::TextureTarget(unsigned int width, unsigned int height)
{
glGenFramebuffers(1, &_framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, _framebuffer);
glGenTextures(1, &_texture);
glBindTexture(GL_TEXTURE_2D, _texture);
uint8_t *emptySpace = new uint8_t[width*height*4];
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, GL_RGBA, GL_UNSIGNED_BYTE, emptySpace);
delete[] emptySpace;
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, _texture, 0);
// TODO: raise an exception if check framebuffer status fails.
// if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
// return nil;
}
TextureTarget::~TextureTarget()
{
glDeleteFramebuffers(1, &_framebuffer);
glDeleteTextures(1, &_texture);
}
void TextureTarget::bind_framebuffer()
{
glBindFramebuffer(GL_FRAMEBUFFER, _framebuffer);
}
void TextureTarget::bind_texture()
{
glBindTexture(GL_TEXTURE_2D, _texture);
}

30
Outputs/CRT/TextureTarget.hpp Normal file
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@ -0,0 +1,30 @@
//
// TextureTarget.hpp
// Clock Signal
//
// Created by Thomas Harte on 07/02/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#ifndef TextureTarget_hpp
#define TextureTarget_hpp
#include "OpenGL.h"
namespace OpenGL {
class TextureTarget {
public:
TextureTarget(unsigned int width, unsigned int height);
~TextureTarget();
void bind_framebuffer();
void bind_texture();
private:
GLuint _framebuffer, _texture;
};
}
#endif /* TextureTarget_hpp */