forked from dolphin-emu/dolphin
129 lines
3.5 KiB
C++
129 lines
3.5 KiB
C++
// Copyright 2015 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <memory>
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#include "Common/GL/GLInterfaceBase.h"
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#include "Common/GL/GLUtil.h"
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#include "Common/Logging/Log.h"
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#include "VideoBackends/Software/SWOGLWindow.h"
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std::unique_ptr<SWOGLWindow> SWOGLWindow::s_instance;
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void SWOGLWindow::Init(void* window_handle)
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{
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InitInterface();
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GLInterface->SetMode(GLInterfaceMode::MODE_DETECT);
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if (!GLInterface->Create(window_handle))
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{
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ERROR_LOG(VIDEO, "GLInterface::Create failed.");
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}
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s_instance.reset(new SWOGLWindow());
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}
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void SWOGLWindow::Shutdown()
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{
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GLInterface->Shutdown();
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GLInterface.reset();
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s_instance.reset();
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}
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void SWOGLWindow::Prepare()
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{
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if (m_init)
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return;
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m_init = true;
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// Init extension support.
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if (!GLExtensions::Init())
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{
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ERROR_LOG(VIDEO, "GLExtensions::Init failed!Does your video card support OpenGL 2.0?");
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return;
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}
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else if (GLExtensions::Version() < 310)
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{
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ERROR_LOG(VIDEO, "OpenGL Version %d detected, but at least 3.1 is required.",
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GLExtensions::Version());
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return;
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}
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std::string frag_shader = "in vec2 TexCoord;\n"
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"out vec4 ColorOut;\n"
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"uniform sampler2D Texture;\n"
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"void main() {\n"
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" ColorOut = texture(Texture, TexCoord);\n"
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"}\n";
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std::string vertex_shader = "out vec2 TexCoord;\n"
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"void main() {\n"
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" vec2 rawpos = vec2(gl_VertexID & 1, (gl_VertexID & 2) >> 1);\n"
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" gl_Position = vec4(rawpos * 2.0 - 1.0, 0.0, 1.0);\n"
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" TexCoord = vec2(rawpos.x, -rawpos.y);\n"
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"}\n";
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std::string header = GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL ?
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"#version 140\n" :
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"#version 300 es\n"
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"precision highp float;\n";
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m_image_program = OpenGL_CompileProgram(header + vertex_shader, header + frag_shader);
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glUseProgram(m_image_program);
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glUniform1i(glGetUniformLocation(m_image_program, "Texture"), 0);
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glGenTextures(1, &m_image_texture);
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glBindTexture(GL_TEXTURE_2D, m_image_texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glGenVertexArrays(1, &m_image_vao);
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}
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void SWOGLWindow::PrintText(const std::string& text, int x, int y, u32 color)
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{
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m_text.push_back({text, x, y, color});
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}
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void SWOGLWindow::ShowImage(const u8* data, int stride, int width, int height, float aspect)
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{
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GLInterface->MakeCurrent();
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GLInterface->Update();
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Prepare();
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GLsizei glWidth = (GLsizei)GLInterface->GetBackBufferWidth();
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GLsizei glHeight = (GLsizei)GLInterface->GetBackBufferHeight();
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glViewport(0, 0, glWidth, glHeight);
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glBindTexture(GL_TEXTURE_2D, m_image_texture);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // 4-byte pixel alignment
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glPixelStorei(GL_UNPACK_ROW_LENGTH, stride / 4);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, GL_RGBA,
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GL_UNSIGNED_BYTE, data);
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glUseProgram(m_image_program);
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glBindVertexArray(m_image_vao);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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// TODO: implement OSD
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// for (TextData& text : m_text)
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// {
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// }
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m_text.clear();
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GLInterface->Swap();
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GLInterface->ClearCurrent();
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}
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int SWOGLWindow::PeekMessages()
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{
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return GLInterface->PeekMessages();
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}
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