From 61c3a0d9e45a587e8fb5e5770eb4db05386bed5f Mon Sep 17 00:00:00 2001
From: degasus <wickmarkus@web.de>
Date: Sat, 26 Sep 2015 10:07:48 +0200
Subject: VideoSW: Split up OGL window handling

This removes OSD support for video software, but it was already broken before.

This commit does not try to fix coding style issues, the rewrite of this presentation API is splitted up.
---
 Source/Core/VideoBackends/Software/SWOGLWindow.cpp | 141 +++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 Source/Core/VideoBackends/Software/SWOGLWindow.cpp

(limited to 'Source/Core/VideoBackends/Software/SWOGLWindow.cpp')

diff --git a/Source/Core/VideoBackends/Software/SWOGLWindow.cpp b/Source/Core/VideoBackends/Software/SWOGLWindow.cpp
new file mode 100644
index 0000000000..c3a5d55941
--- /dev/null
+++ b/Source/Core/VideoBackends/Software/SWOGLWindow.cpp
@@ -0,0 +1,141 @@
+// 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, false))
+	{
+		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;
+	}
+
+	static const char *fragShaderText =
+		"#ifdef GL_ES\n"
+		"precision highp float;\n"
+		"#endif\n"
+		"varying vec2 TexCoordOut;\n"
+		"uniform sampler2D Texture;\n"
+		"void main() {\n"
+		"	gl_FragColor = texture2D(Texture, TexCoordOut);\n"
+		"}\n";
+	static const char *vertShaderText =
+		"#ifdef GL_ES\n"
+		"precision highp float;\n"
+		"#endif\n"
+		"attribute vec4 pos;\n"
+		"attribute vec2 TexCoordIn;\n "
+		"varying vec2 TexCoordOut;\n "
+		"void main() {\n"
+		"	gl_Position = pos;\n"
+		"	TexCoordOut = TexCoordIn;\n"
+		"}\n";
+
+	m_image_program = OpenGL_CompileProgram(vertShaderText, fragShaderText);
+
+	glUseProgram(m_image_program);
+
+	m_uni_tex = glGetUniformLocation(m_image_program, "Texture");
+	m_attr_pos = glGetAttribLocation(m_image_program, "pos");
+	m_attr_tex = glGetAttribLocation(m_image_program, "TexCoordIn");
+
+	glUniform1i(m_uni_tex, 0);
+
+	glGenTextures(1, &m_image_texture);
+}
+
+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);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+	glUseProgram(m_image_program);
+	static const GLfloat verts[4][2] = {
+		{ -1, -1}, // Left top
+		{ -1,  1}, // left bottom
+		{  1,  1}, // right bottom
+		{  1, -1} // right top
+	};
+	static const GLfloat texverts[4][2] = {
+		{0, 1},
+		{0, 0},
+		{1, 0},
+		{1, 1}
+	};
+
+	glVertexAttribPointer(m_attr_pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
+	glVertexAttribPointer(m_attr_tex, 2, GL_FLOAT, GL_FALSE, 0, texverts);
+	glEnableVertexAttribArray(m_attr_pos);
+	glEnableVertexAttribArray(m_attr_tex);
+	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+	glDisableVertexAttribArray(m_attr_pos);
+	glDisableVertexAttribArray(m_attr_tex);
+
+// TODO: implement OSD
+//	for (TextData& text : m_text)
+//	{
+//	}
+	m_text.clear();
+
+	GLInterface->Swap();
+	GLInterface->ClearCurrent();
+}
+
+int SWOGLWindow::PeekMessages()
+{
+	return GLInterface->PeekMessages();
+}
+
-- 
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