Merge pull request #3155 from degasus/videosw

VideoSW: Split up OGL window handling

1 files changed, 130 insertions, 0 deletions

diff --git a/Source/Core/VideoBackends/Software/SWOGLWindow.cpp b/Source/Core/VideoBackends/Software/SWOGLWindow.cpp
new file mode 100644
index 0000000000..be4ee68e32
--- /dev/null
+++ b/Source/Core/VideoBackends/Software/SWOGLWindow.cpp
@@ -0,0 +1,130 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/GL/GLInterfaceBase.h"
+#include "Common/GL/GLUtil.h"
+#include "Common/Logging/Log.h"
+
+#include "VideoBackends/Software/SWOGLWindow.h"
+
+std::unique_ptr<SWOGLWindow> SWOGLWindow::s_instance;
+
+void SWOGLWindow::Init(void *window_handle)
+{
+	InitInterface();
+	GLInterface->SetMode(GLInterfaceMode::MODE_DETECT);
+	if (!GLInterface->Create(window_handle))
+	{
+		INFO_LOG(VIDEO, "GLInterface::Create failed.");
+	}
+
+	s_instance.reset(new SWOGLWindow());
+}
+
+void SWOGLWindow::Shutdown()
+{
+	GLInterface->Shutdown();
+	delete GLInterface;
+	GLInterface = nullptr;
+
+	SWOGLWindow::s_instance.release();
+}
+
+void SWOGLWindow::Prepare()
+{
+	if (m_init) return;
+	m_init = true;
+
+	// Init extension support.
+	if (!GLExtensions::Init())
+	{
+		ERROR_LOG(VIDEO, "GLExtensions::Init failed!Does your video card support OpenGL 2.0?");
+		return;
+	}
+	else if (GLExtensions::Version() < 310)
+	{
+		ERROR_LOG(VIDEO, "OpenGL Version %d detected, but at least 3.1 is required.", GLExtensions::Version());
+		return;
+	}
+
+	std::string frag_shader =
+		"in vec2 TexCoord;\n"
+		"out vec4 ColorOut;\n"
+		"uniform sampler2D Texture;\n"
+		"void main() {\n"
+		"	ColorOut = texture2D(Texture, TexCoord);\n"
+		"}\n";
+
+	std::string vertex_shader =
+		"out vec2 TexCoord;\n"
+		"void main() {\n"
+		"	vec2 rawpos = vec2(gl_VertexID & 1, (gl_VertexID & 2) >> 1);\n"
+		"	gl_Position = vec4(rawpos * 2.0 - 1.0, 0.0, 1.0);\n"
+		"	TexCoord = vec2(rawpos.x, -rawpos.y);\n"
+		"}\n";
+
+	std::string header =
+		GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL ?
+			"#version 140\n"
+		:
+			"#version 300 es\n"
+			"precision highp float;\n";
+
+	m_image_program = OpenGL_CompileProgram(header + vertex_shader, header + frag_shader);
+
+	glUseProgram(m_image_program);
+
+	glUniform1i(glGetUniformLocation(m_image_program, "Texture"), 0);
+
+	glGenTextures(1, &m_image_texture);
+	glBindTexture(GL_TEXTURE_2D, m_image_texture);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+	glGenVertexArrays(1, &m_image_vao);
+}
+
+void SWOGLWindow::PrintText(const std::string& text, int x, int y, u32 color)
+{
+	TextData data{text, x, y, color};
+	m_text.emplace_back(data);
+}
+
+void SWOGLWindow::ShowImage(u8* data, int stride, int width, int height, float aspect)
+{
+	GLInterface->MakeCurrent();
+	GLInterface->Update();
+	Prepare();
+
+	GLsizei glWidth = (GLsizei)GLInterface->GetBackBufferWidth();
+	GLsizei glHeight = (GLsizei)GLInterface->GetBackBufferHeight();
+
+	glViewport(0, 0, glWidth, glHeight);
+
+	glBindTexture(GL_TEXTURE_2D, m_image_texture);
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 4);  // 4-byte pixel alignment
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, stride / 4);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+
+	glUseProgram(m_image_program);
+
+	glBindVertexArray(m_image_vao);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+// TODO: implement OSD
+//	for (TextData& text : m_text)
+//	{
+//	}
+	m_text.clear();
+
+	GLInterface->Swap();
+	GLInterface->ClearCurrent();
+}
+
+int SWOGLWindow::PeekMessages()
+{
+	return GLInterface->PeekMessages();
+}
+