Added TextureAtlas, broke rendering

CMakeLists.txt

@@ -9,3 +9,5 @@ add_subdirectory(viewer)
 
 add_subdirectory(framework2)
 add_subdirectory(analyzer)
+
+add_subdirectory(tests)

framework2/GTARenderer.cpp

@@ -422,9 +422,6 @@ void GTARenderer::renderNamedFrame(Model* model, const glm::mat4 &matrix, const
 			culled++;
 			continue;
 		}
-		else {
-			rendered++;
-		}
 
 		renderGeometry(model, g, matrix);
 		break;
@@ -452,7 +449,7 @@ void GTARenderer::renderGeometry(Model* model, size_t g, const glm::mat4& modelM
     glEnableVertexAttribArray(normalAttrib);
     glEnableVertexAttribArray(colourAttrib);
 
-    for(size_t sg = 0; sg < model->geometries[g].subgeom.size(); ++sg)
+	for(size_t sg = 0; sg <1 && sg < model->geometries[g].subgeom.size(); ++sg)
 	{
         if (model->geometries[g].materials.size() > model->geometries[g].subgeom[sg].material) {
             Model::Material& mat = model->geometries[g].materials[model->geometries[g].subgeom[sg].material];
@@ -487,9 +484,11 @@ void GTARenderer::renderGeometry(Model* model, size_t g, const glm::mat4& modelM
             glUniform1f(uniMatAmbient, mat.ambientIntensity);
         }
 
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, model->geometries[g].subgeom[sg].EBO);
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, model->geometries[g].EBO);
 
-        glDrawElements((model->geometries[g].facetype == Model::Triangles ? GL_TRIANGLES : GL_TRIANGLE_STRIP), model->geometries[g].subgeom[sg].indices.size(), GL_UNSIGNED_INT, NULL);
+		rendered++;
+
+		glDrawElements((model->geometries[g].facetype == Model::Triangles ? GL_TRIANGLES : GL_TRIANGLE_STRIP), model->geometries[g].indicesCount, GL_UNSIGNED_INT, NULL);
     }
 }
 
@@ -503,9 +502,6 @@ void GTARenderer::renderModel(Model* model, const glm::mat4& modelMatrix, GTAObj
             culled++;
             continue;
 		}
-        else {
-            rendered++;
-        }
 
         int32_t fi = model->atomics[a].frame;
         if( object && object->type() == GTAObject::Vehicle ) {

framework2/LoaderDFF.cpp

@@ -230,10 +230,13 @@ Model* LoaderDFF::loadFromMemory(char *data)
 					// OpenGL buffer stuff
 					glGenBuffers(1, &geometryStruct.VBO);
 					glGenBuffers(1, &geometryStruct.EBO);
+					size_t Ecount = 0;
 					for(size_t i  = 0; i < geometryStruct.subgeom.size(); ++i)
 					{
-						glGenBuffers(1, &(geometryStruct.subgeom[i].EBO));
+						Ecount += geometryStruct.subgeom[i].indices.size();
+						//glGenBuffers(1, &(geometryStruct.subgeom[i].EBO));
 					}
+					geometryStruct.indicesCount = Ecount;
 
 					size_t buffsize = (geometryStruct.vertices.size() * sizeof(float) * 3)
 									+ (geometryStruct.texcoords.size() * sizeof(float) * 2)
@@ -293,23 +296,33 @@ Model* LoaderDFF::loadFromMemory(char *data)
 						indicies[i + 2] = tri.third;
 						i += 3;
 					}
-					glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, geometryStruct.EBO);
+
+					/*glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, geometryStruct.EBO);
 					glBufferData(
 						GL_ELEMENT_ARRAY_BUFFER,
 						sizeof(indicies),
 						indicies,
 						GL_STATIC_DRAW
-					);
+					);*/
 
-					for(size_t i  = 0; i < geometryStruct.subgeom.size(); ++i)
+					// Allocate complete EBO buffer.
-					{
+					glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, geometryStruct.EBO);
-						glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, geometryStruct.subgeom[i].EBO);
 					glBufferData(
 								GL_ELEMENT_ARRAY_BUFFER,
+								sizeof(uint32_t) * geometryStruct.indicesCount,
+								nullptr,
+								GL_STATIC_DRAW);
+
+					// Upload each subgeometry chunk.
+					size_t subOffset = 0;
+					for(size_t i = 0; i < geometryStruct.subgeom.size(); ++i)
+					{
+						glBufferSubData(
+								GL_ELEMENT_ARRAY_BUFFER,
+								subOffset,
 								sizeof(uint32_t) * geometryStruct.subgeom[i].indices.size(),
-							&(geometryStruct.subgeom[i].indices[0]),
+								&(geometryStruct.subgeom[i].indices[0]));
-							GL_STATIC_DRAW
+						subOffset += sizeof(uint32_t) * geometryStruct.subgeom[i].indices.size();
-						);
 					}
 					
 					geometryStruct.clumpNum = clumpID;

framework2/TextureAtlas.cpp

@@ -0,0 +1,58 @@
+#include <renderwure/render/TextureAtlas.hpp>
+#include <algorithm>
+
+TextureAtlas::TextureAtlas(size_t w, size_t h)
+	: width(w), height(h), textureName(0), X(0), Y(0), rowHeight(0)
+{
+	glGenTextures(1, &textureName);
+	glBindTexture(GL_TEXTURE_2D, textureName);
+	glTexImage2D(
+		GL_TEXTURE_2D, 0, GL_RGBA,
+		width, height, 0,
+		GL_RGBA, GL_UNSIGNED_BYTE, nullptr
+	);
+}
+
+TextureAtlas::~TextureAtlas()
+{
+	glDeleteTextures(1, &textureName);
+}
+
+void TextureAtlas::packTexture(uint8_t *data, size_t w, size_t h, float &s, float &t, float &sX, float &sY)
+{
+	// Ignore null pointer data for testing purposes.
+	if( data != nullptr )
+	{
+		glBindTexture(GL_TEXTURE_2D, textureName);
+		glTexSubImage2D(GL_TEXTURE_2D, 0, X, Y, w, h, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	}
+	s = X/(float)width;
+	t = Y/(float)height;
+	sX = w/(float)width;
+	sY = h/(float)height;
+
+	rowHeight = std::max(rowHeight, h);
+	X += w;
+	if( X >= width ) {
+		Y += rowHeight;
+		X = rowHeight = 0;
+	}
+}
+
+bool TextureAtlas::canPack(size_t *w, size_t *h, size_t n) const
+{
+	size_t rwHeight = rowHeight;
+	size_t lX = X, lY = Y;
+	for(size_t i = 0; i < n; ++i) {
+		lX += (w[i]);
+		rwHeight = std::max(rwHeight, h[i]);
+		if(lX >= width) {
+			lY += rwHeight;
+			lX = rwHeight = 0;
+		}
+	}
+	if(lX <= width && lY <= height) {
+		return true;
+	}
+	return false;
+}

framework2/TextureLoader.cpp

@@ -38,6 +38,8 @@ bool TextureLoader::loadFromMemory(char *data)
 		
 		GLuint texture = 0;
 
+		std::cout << texNative.width << "x" <<  texNative.height << std::endl;
+		
 		if(texNative.platform != 8) 
 		{
 			std::cerr << "Unsupported texture platform " << std::dec << texNative.platform << std::endl;

framework2/include/renderwure/loaders/LoaderDFF.hpp

@@ -35,7 +35,7 @@ public:
 	};
 	
     struct SubGeometry {
-		GLuint EBO;
+		//GLuint EBO;
         size_t material;
 		std::vector<uint32_t> indices;
 	};
@@ -56,6 +56,7 @@ public:
 		std::vector<glm::vec4> colours;
 		std::vector<RW::BSTVector3> vertices;
 		std::vector<RW::BSTVector3> normals;
+		uint32_t indicesCount;
 
 		std::vector<Material> materials;
 		std::vector<SubGeometry> subgeom;

framework2/include/renderwure/render/TextureAtlas.hpp

@@ -0,0 +1,43 @@
+#pragma once
+#ifndef _TEXTURE_ATLAS_HPP_
+#define _TEXTURE_ATLAS_HPP_
+#include <GL/gl.h>
+
+class TextureAtlas
+{
+	/**
+	 * @brief width Width of the backing texture.
+	 */
+	size_t width;
+	/**
+	 * @brief height Height of the backing texture.
+	 */
+	size_t height;
+
+	GLuint textureName;
+
+	size_t X; // X edge of latest texture.
+	size_t Y; // Y of current row.
+	size_t rowHeight; // Maximum texture height for the current row.
+
+public:
+
+	TextureAtlas(size_t w, size_t h);
+
+	~TextureAtlas();
+
+	void packTexture(uint8_t* data, size_t w, size_t h, float& s, float& t, float& sX, float& sY);
+
+	/**
+	 * @brief canPack Returns true if enough space remains in the atlas
+	 *  for the given texture sizes to be packed.
+	 * @param w
+	 * @param h
+	 * @param n
+	 * @return True on success, false on failure.
+	 */
+	bool canPack(size_t* w, size_t* h, size_t n) const;
+
+};
+
+#endif

tests/CMakeLists.txt

@@ -0,0 +1,16 @@
+
+FILE(GLOB TEST_SOURCES "*.cpp")
+ADD_DEFINITIONS(-DBOOST_TEST_DYN_LINK) 
+
+add_executable(run_tests ${TEST_SOURCES}) 
+
+include_directories(include)
+include_directories(${PROJECT_SOURCE_DIR}/engine/include) 
+
+find_package(Boost COMPONENTS unit_test_framework REQUIRED)
+
+include_directories(../framework2/include)
+
+target_link_libraries(run_tests renderware sfml-window sfml-system GL ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY})
+
+add_test(UnitTests run_tests)

tests/main.cpp

@@ -0,0 +1,21 @@
+#define BOOST_TEST_MODULE gtfw
+#include <boost/test/included/unit_test.hpp>
+#include <SFML/Window.hpp>
+
+// Many tests require OpenGL be functional, seems like a reasonable solution.
+
+class GlobalFixture
+{
+public:
+	sf::Window wnd;
+
+	GlobalFixture() {
+		wnd.create(sf::VideoMode(640, 360), "Testing");
+	}
+
+	~GlobalFixture() {
+		wnd.close();
+	}
+};
+
+BOOST_GLOBAL_FIXTURE(GlobalFixture)

tests/test_atlas.cpp

@@ -0,0 +1,56 @@
+#include <boost/test/unit_test.hpp>
+#include <renderwure/render/TextureAtlas.hpp>
+
+BOOST_AUTO_TEST_SUITE(TextureAtlasTests)
+
+BOOST_AUTO_TEST_CASE(atlas_fill_test)
+{
+	TextureAtlas atlas(16, 16);
+
+	size_t dim = 16;
+
+	BOOST_CHECK( atlas.canPack(&dim, &dim, 1) );
+
+	float s, t, w, h;
+
+	atlas.packTexture(nullptr, dim, dim, s, t, w, h);
+
+	BOOST_CHECK( s == 0.f );
+	BOOST_CHECK( t == 0.f );
+	BOOST_CHECK( w == 1.f );
+	BOOST_CHECK( h == 1.f );
+
+	BOOST_CHECK( atlas.canPack(&dim, &dim, 1) == false );
+}
+
+BOOST_AUTO_TEST_CASE(atlas_pack_test)
+{
+	TextureAtlas atlas(4, 4);
+	size_t dim = 1;
+
+	uint8_t pixels[] = { 0xFF, 0x00, 0x00, 0xFF,
+						 0x00, 0xFF, 0x00, 0xFF,
+						 0x00, 0x00, 0xFF, 0xFF,
+						 0x00, 0x00, 0x00, 0xFF };
+
+	float s, t, w, h;
+
+	atlas.packTexture(pixels+0, dim, dim, s, t, w, h);
+	BOOST_CHECK( s == 0.f && t == 0.f && w == 0.25f && h == 0.25f );
+	atlas.packTexture(pixels+4, dim, dim, s, t, w, h);
+	BOOST_CHECK( s == 0.25f && t == 0.f && w == 0.25f && h == 0.25f );
+	atlas.packTexture(pixels+8, dim, dim, s, t, w, h);
+	BOOST_CHECK( s == 0.5f && t == 0.f && w == 0.25f && h == 0.25f );
+	atlas.packTexture(pixels+12, dim, dim, s, t, w, h);
+	BOOST_CHECK( s == 0.75f && t == 0.f && w == 0.25f && h == 0.25f );
+
+	BOOST_CHECK( atlas.canPack(&dim, &dim, 1) == true );
+
+	uint8_t outPixels[4*4*4];
+	glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, outPixels);
+	for(size_t p = 0; p < 16; ++p) {
+		BOOST_CHECK(outPixels[p] == pixels[p]);
+	}
+}
+
+BOOST_AUTO_TEST_SUITE_END()

viewer/main.cpp

@@ -121,6 +121,10 @@ void init(std::string gtapath)
     debugDrawer->setShaderProgram(gta->renderer.worldProgram);
     debugDrawer->setDebugMode(btIDebugDraw::DBG_DrawWireframe);
     gta->dynamicsWorld->setDebugDrawer(debugDrawer);
+
+	std::cout << "Loaded "
+			  << gta->gameData.models.size() << " models, "
+			  << gta->gameData.textureLoader.textures.size() << " textures" << std::endl;
 }
 
 void update(float dt)