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#include <llmr/renderer/painter.hpp>
#include <iostream>
#include <assert.h>
#include <llmr/util/mat4.h>
#include <llmr/platform/platform.hpp>
#include <llmr/map/transform.hpp>
#include <llmr/map/tile.hpp>
using namespace llmr;
#define BUFFER_OFFSET(i) ((char *)NULL + (i))
GLfloat triangle_vertices[] = {
100, 100,
100, 300,
150, 150
};
GLfloat fill_vertices[] = {
0, 0,
300, 0,
0, 300,
300, 300
};
painter::painter(class platform *platform)
: platform(platform),
transform(NULL),
width(0),
height(0),
currentShader(NULL),
fillShader(NULL) {
}
void painter::setTransform(class transform *transform) {
this->transform = transform;
}
void painter::setup() {
setupShaders();
assert(fillShader);
glGenBuffers(1, &triangleVertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(triangle_vertices), triangle_vertices, GL_STATIC_DRAW);
glGenBuffers(1, &fillVertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, fillVertexBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(fill_vertices), fill_vertices, GL_STATIC_DRAW);
// glGenVertexArraysOES(1, &vertexArray);
// glBindVertexArrayOES(vertexArray);
// glBindVertexArrayOES(0);
}
void painter::setupShaders() {
const GLchar *vertexSource, *fragmentSource;
vertexSource = platform->shaderSource("fill", "vertex.glsl");
assert((vertexSource, "Missing fill vertex shader source"));
fragmentSource = platform->shaderSource("fill", "fragment.glsl");
assert((fragmentSource, "Missing fill fragment shader source"));
fillShader = new FillShader(vertexSource, fragmentSource);
vertexSource = platform->shaderSource("line", "vertex.glsl");
assert((vertexSource, "Missing line vertex shader source"));
fragmentSource = platform->shaderSource("line", "fragment.glsl");
assert((fragmentSource, "Missing line fragment shader source"));
lineShader = new LineShader(vertexSource, fragmentSource);
}
void painter::teardown() {
glDeleteBuffers(1, &triangleVertexBuffer);
glDeleteBuffers(1, &fillVertexBuffer);
// glDeleteVertexArraysOES(1, &vertexArray);
if (fillShader) {
delete fillShader;
fillShader = NULL;
}
if (lineShader) {
delete lineShader;
lineShader = NULL;
}
}
void painter::resize(GLuint new_width, GLuint new_height) {
if (width == new_width && height == new_height) {
return;
}
fprintf(stderr, "changing viewport size to %d/%d\n", new_width, new_height);
width = new_width;
height = new_height;
}
void painter::changeMatrix() {
assert(transform);
// Initialize projection matrix
float projMatrix[16];
mat4_ortho(projMatrix, 0, width, height, 0, 1, 10);
float mvMatrix[16];
mat4_identity(mvMatrix);
mat4_translate(mvMatrix, mvMatrix, transform->x, transform->y, -1);
mat4_scale(mvMatrix, mvMatrix, transform->scale / 8, transform->scale / 8, 1);
mat4_multiply(matrix, projMatrix, mvMatrix);
}
void painter::clear() {
glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
}
void painter::render(tile *tile) {
changeMatrix();
glDisable(GL_STENCIL_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// fprintf(stderr, "render tile\n");
switchShader(lineShader, matrix);
glUniformMatrix4fv(lineShader->u_matrix, 1, GL_FALSE, matrix);
// glEnable(GL_BLEND);
// glVertexAttribPointer(fillShader->a_pos, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
// glVertexAttribPointer(fillShader->a_pos, 2, GL_SHORT, GL_FALSE, 0, BUFFER_OFFSET(0));
// glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBuffer);
tile->lineVertex.bind();
glVertexAttribPointer(lineShader->a_pos, 2, GL_SHORT, GL_FALSE, 0, BUFFER_OFFSET(0));
glUniform4f(lineShader->u_color, 0.0f, 0.0f, 0.0f, 1.0f);
glLineWidth(1.0f);
glDrawArrays(GL_LINE_STRIP, 0, tile->lineVertex.length());
// switchShader(fillShader, matrix);
// glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBuffer);
// glVertexAttribPointer(fillShader->a_pos, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
// glUniform4f(fillShader->u_color, 0.0f, 1.0f, 0.0f, 1.0f);
// glDrawArrays(GL_TRIANGLE_STRIP, 0, 3);
// glBindVertexArrayOES(vertexArray);
// switchShader(fillShader, matrix);
// glUniformMatrix4fv(fillShader->u_matrix, 1, GL_FALSE, matrix);
// glEnable(GL_STENCIL_TEST);
// Draw stencil mask.
// glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
// glStencilOp(GL_REPLACE, GL_KEEP, GL_KEEP);
// glStencilFunc(GL_EQUAL, 0xFF, 0xFF);
// glStencilMask(0xFF);
// glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBuffer);
// glVertexAttribPointer(fillShader->a_pos, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
// glUniform4f(fillShader->u_color, 0.0f, 1.0f, 0.0f, 1.0f);
// glDrawArrays(GL_TRIANGLE_STRIP, 0, 3);
// // Draw covering fill.
// glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
// glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
// glStencilFunc(GL_EQUAL, 0xFF, 0xFF);
// glBindBuffer(GL_ARRAY_BUFFER, fillVertexBuffer);
// glVertexAttribPointer(fillShader->a_pos, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
// glUniform4f(fillShader->u_color, 1.0f, 0.0f, 0.0f, 1.0f);
// glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
void painter::viewport() {
}
// Switches to a different shader program.
void painter::switchShader(Shader *shader, float matrix[16]) {
if (currentShader != shader) {
glUseProgram(shader->program);
// Disable all attributes from the existing shader that aren't used in
// the new shader. Note: attribute indices are *not* program specific!
if (currentShader) {
// const std::vector<GLuint> &enabled = currentShader->attributes;
// const std::vector<GLuint> &required = shader->attributes;
// TODO
// for (var i = 0; i < enabled.length; i++) {
// if (required.indexOf(enabled[i]) < 0) {
// gl.disableVertexAttribArray(enabled[i]);
// }
// }
// // Enable all attributes for the new shader.
// for (var j = 0; j < required.length; j++) {
// if (enabled.indexOf(required[j]) < 0) {
// gl.enableVertexAttribArray(required[j]);
// }
// }
} else {
// Enable all attributes for the new shader.
for (GLuint index : shader->attributes) {
glEnableVertexAttribArray(index);
}
}
}
currentShader = shader;
}
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