tmp

RasterRender/private/Texture.cpp

@@ -0,0 +1,205 @@
+
+#include "Texture.hpp"
+
+#include "Map.hpp"
+
+#include "Shader.hpp"
+
+#include "GraphicsApi.hpp"
+
+const char* texture_vertex =
+#ifdef ENV_OS_ANDROID
+"#version 300 es\n"
+"precision mediump float;\n"
+#else
+"#version 330 core\n"
+#endif
+"layout(location = 0) in vec3 vPos;\n"
+"out vec2 UV;\n"
+"void main() {\n"
+"	gl_Position = vec4(vPos, 1);\n"
+"	UV = (vPos.xy + vec2(1, 1)) / 2.0;\n"
+"}\n";
+
+const char* texture_fragment =
+#ifdef ENV_OS_ANDROID
+"#version 300 es\n"
+"precision mediump float;\n"
+#else
+"#version 330 core\n"
+#endif
+"in vec2 UV;\n"
+"out vec4 color;\n"
+"uniform sampler2D renderedTexture;\n"
+"uniform float time;\n"
+"void main() {\n"
+"	vec4 texColor = texture(renderedTexture, UV);\n"
+" if (texColor.a < 0.2)\n"
+"		discard;\n"
+" color = texColor;\n"
+"}\n";
+
+
+using namespace tp;
+
+GLuint RenderTexture::getid() { return id; }
+
+RenderTexture::RenderTexture() {
+	glGenTextures(1, &id);
+	glBindTexture(GL_TEXTURE_2D, id);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+RenderTexture::~RenderTexture() { glDeleteTextures(1, &id); }
+
+
+void RenderTexture::update(const Buffer2D<RGBA>& buff) {
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)buff.size().x, (GLsizei)buff.size().y, 0, GL_RGBA, GL_FLOAT, buff.getBuff());
+}
+
+void RenderTexture::draw(const GLuint& out) {
+	draw_texture(out, id);
+}
+
+
+struct texture_drawer_data {
+
+	Map<std::string, GLuint> textures;
+
+	GLuint quad_VertexArrayID;
+	GLuint quad_vertexbuffer;
+	GLuint texID;
+	RenderShader shader;
+
+	const GLfloat g_quad_vertex_buffer_data[18] = {
+			-1.0f, -1.0f, 0.0f, 1.0f, -1.0f, 0.0f, -1.0f, 1.0f, 0.0f,
+			-1.0f, 1.0f,  0.0f, 1.0f, -1.0f, 0.0f, 1.0f,  1.0f, 0.0f,
+	};
+
+	texture_drawer_data() : shader(texture_vertex, nullptr, texture_fragment, false) {
+		// The fullscreen quad's FBO
+		glGenVertexArrays(1, &quad_VertexArrayID);
+		glBindVertexArray(quad_VertexArrayID);
+
+		glGenBuffers(1, &quad_vertexbuffer);
+		glBindBuffer(GL_ARRAY_BUFFER, quad_vertexbuffer);
+		glBufferData(GL_ARRAY_BUFFER, sizeof(g_quad_vertex_buffer_data),
+			g_quad_vertex_buffer_data, GL_STATIC_DRAW);
+
+		texID = shader.getu("renderedTexture");
+	}
+
+	~texture_drawer_data() {
+		glDeleteBuffers(1, &quad_vertexbuffer);
+		glDeleteVertexArrays(1, &quad_VertexArrayID);
+
+		for (auto tex : textures) {
+			glDeleteTextures(1, &tex->val);
+		}
+	}
+};
+
+texture_drawer_data* texdd = NULL;
+
+void RenderTexture::init() {
+	if (!texdd) texdd = new texture_drawer_data();
+}
+
+void RenderTexture::deinit() {
+	if (texdd) delete texdd;
+	texdd = NULL;
+}
+
+void RenderTexture::draw_texture(uint4 out, uint4 in) {
+	ASSERT(in);
+
+	// Render to the screen
+	glBindFramebuffer(GL_FRAMEBUFFER, out);
+
+	// Use our shader
+	texdd->shader.bind();
+
+	// Bind our texture in Texture Unit 0
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(GL_TEXTURE_2D, in);
+	// Set our "renderedTexture" sampler to use Texture Unit 0
+	glUniform1i(texdd->texID, 0);
+
+	// glUniformMatrix4fv(texdd->rect_mat, 1, GL_FALSE, &tmat[0][0]);
+
+	// 1rst attribute buffer : vertices
+	glEnableVertexAttribArray(0);
+	glBindBuffer(GL_ARRAY_BUFFER, texdd->quad_vertexbuffer);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
+
+	// Draw the triangles. 2*3 indices starting at 0 -> 2 triangles
+	glDrawArrays(GL_TRIANGLES, 0, 6);
+
+	glDisableVertexAttribArray(0);
+
+	texdd->shader.unbind();
+}
+
+GLuint load_texture(const std::string& name) {
+	GLuint tex_2d = 0;
+
+	ASSERT(0 && "incomplete compilation - no SOIL support added");
+
+	if (0) {
+		//auto document = lunasvg::Document::loadFromFile("tiger.svg");
+		//auto bitmap = document->renderToBitmap();
+	}
+	else {
+		/*
+		tex_2d = SOIL_load_OGL_texture(
+			name.cstr(), SOIL_LOAD_RGBA, SOIL_CREATE_NEW_ID,
+			SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB |
+			SOIL_FLAG_COMPRESS_TO_DXT);
+
+		if (0 == tex_2d) {
+			printf("SOIL loading error: '%s'\n", SOIL_last_result());
+		}
+		*/
+	}
+
+	return tex_2d;
+}
+
+GLuint RenderTexture::get_tex(const char* TexId) {
+	GLuint out = 0;
+	auto idx = texdd->textures.presents(TexId);
+	if (idx) {
+		out = texdd->textures.get(TexId);
+	}
+	else {
+		out = load_texture(TexId);
+		texdd->textures.put(TexId, out);
+	}
+	return out;
+}
+
+void RenderTexture::drawCurcle(Vec2F pos, double radius, RGBA col) {
+#ifndef ENV_OS_ANDROID
+	static alni precision = 40;
+
+	glColor4f(col.r, col.g, col.b, col.a);
+
+	double twicePi = 2.0 * 3.142;
+
+	glBegin(GL_TRIANGLE_FAN);  // BEGIN CIRCLE
+	glVertex2f(pos.x, pos.y);  // center of circle
+
+	for (alni i = 0; i <= precision; i++) {
+		glVertex2f((GLfloat)(pos.x + (radius * cos(i * twicePi / precision))),
+			(GLfloat)(pos.y + (radius * sin(i * twicePi / precision))));
+	}
+	glEnd();  // END
+#endif 
+}
+
+