X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fscreen.cpp;h=dc59de90904d684a6cc378283a1028bdafd783a1;hp=5bca5544dc9042a04f051265b66ec56339397b81;hb=3ab3475a54c82cb9f5e0b1dbb88035f341b92d49;hpb=433bde2ed090928b264203c9f422a5b220857120

diff --git a/src/screen.cpp b/src/screen.cpp
index 5bca554..dc59de9 100644
--- a/src/screen.cpp
+++ b/src/screen.cpp
@@ -22,6 +22,7 @@ static void opengl_debug_callback(GLenum source, GLenum type, GLuint id, GLenum
 
 Screen::Screen()
 {
+
 	SDL_Init(SDL_INIT_VIDEO);
 	m_window = SDL_CreateWindow("IPDF", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
 			800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
@@ -68,17 +69,20 @@ Screen::Screen()
 	glGenVertexArrays(1, &default_vao);
 	glBindVertexArray(default_vao);
 
-	//TODO: Error checking.
-	m_texture_prog.AttachVertexProgram(BASICTEX_VERT);
-	m_texture_prog.AttachFragmentProgram(BASICTEX_FRAG);
-	m_texture_prog.Link();
+	m_texture_prog.InitialiseShaders(BASICTEX_VERT, BASICTEX_FRAG);
 	m_texture_prog.Use();
 
 	// We always want to use the texture bound to texture unit 0.
 	GLint texture_uniform_location = m_texture_prog.GetUniformLocation("tex");
 	glUniform1i(texture_uniform_location, 0);
 
-	m_colour_uniform_location = m_texture_prog.GetUniformLocation("colour");
+	m_font_prog.InitialiseShaders(BASICTEX_VERT, "shaders/fonttex_frag.glsl");
+	m_font_prog.Use();
+
+	// We always want to use the texture bound to texture unit 0.
+	GLint font_texture_uniform_location = m_font_prog.GetUniformLocation("tex");
+	glUniform1i(font_texture_uniform_location, 0);
+	m_colour_uniform_location = m_font_prog.GetUniformLocation("colour");
 
 	m_viewport_ubo.SetUsage(GraphicsBuffer::BufferUsageDynamicDraw);
 	m_viewport_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
@@ -218,6 +222,48 @@ double Screen::GetLastFrameTimeGPU() const
 	return frame_time_ns/1000000000.0;
 }
 
+void Screen::RenderPixels(int x, int y, int w, int h, uint8_t *pixels) const
+{
+	GLenum texture_format = GL_RGBA;
+
+	m_texture_prog.Use();
+	GraphicsBuffer quad_vertex_buffer;
+	quad_vertex_buffer.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
+	quad_vertex_buffer.SetType(GraphicsBuffer::BufferTypeVertex);
+	//rectangular texture == 2 triangles
+	GLfloat quad[] = { 
+		0, 0, (float)x, (float)y,
+		1, 0, (float)(x+w), (float)y,
+		0, 1, (float)x, (float)(y+h),
+		1, 1, (float)(x+w), (float)(y+h)
+	};
+	quad_vertex_buffer.Upload(sizeof(GLfloat) * 16, quad);
+	quad_vertex_buffer.Bind();
+	m_viewport_ubo.Bind();
+
+	glUniform4f(m_colour_uniform_location, 1.0f, 1.0f, 1.0f, 1.0f);
+
+	GLuint texID;
+	glGenTextures(1, &texID);
+	glBindTexture(GL_TEXTURE_2D, texID);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, texture_format, GL_UNSIGNED_BYTE, pixels);
+
+	glEnableVertexAttribArray(0);
+	glEnableVertexAttribArray(1);
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
+	glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+	glDisableVertexAttribArray(1);
+	glDisableVertexAttribArray(0);
+
+}
+
 void Screen::ScreenShot(const char * filename) const
 {
 	Debug("Attempting to save BMP to file %s", filename);
@@ -368,7 +414,7 @@ void Screen::DebugFontFlush()
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
 
-	m_texture_prog.Use();
+	m_font_prog.Use();
 	m_viewport_ubo.Bind();
 	m_debug_font_vertices.Bind();
 	m_debug_font_indices.Bind();