#include <epoxy/gl.h>
#include <math.h>
+#include <string>
+#include <vector>
+
+#include "resource_pool.h"
#include "widgets.h"
#include "util.h"
#define HSV_WHEEL_SIZE 128
+using namespace std;
+
namespace movit {
-GLuint hsv_wheel_num;
+GLuint hsv_wheel_texnum = 0;
+GLuint textured_program_num = 0, colored_program_num = 0, hsv_vao = 0;
+ResourcePool resource_pool;
-void draw_hsv_wheel(float y, float rad, float theta, float value)
+void draw_black_point(float x, float y, float point_size)
{
- glUseProgram(0);
- check_error();
- glActiveTexture(GL_TEXTURE0);
+ glUseProgram(colored_program_num);
check_error();
- glEnable(GL_TEXTURE_2D);
+
+ float vertices[] = { x, y };
+ float colors[] = { 0.0f, 0.0f, 0.0f };
+
+ glPointSize(point_size);
check_error();
- glBindTexture(GL_TEXTURE_2D, hsv_wheel_num);
+ GLuint position_vbo = fill_vertex_attribute(colored_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
+ GLuint color_vbo = fill_vertex_attribute(colored_program_num, "color", 3, GL_FLOAT, sizeof(colors), colors);
check_error();
- glActiveTexture(GL_TEXTURE1);
+ glDrawArrays(GL_POINTS, 0, 1);
check_error();
- glBindTexture(GL_TEXTURE_2D, 0);
+ cleanup_vertex_attribute(colored_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(colored_program_num, "color", color_vbo);
+}
+
+void draw_hsv_wheel(float y, float rad, float theta, float value)
+{
+ glUseProgram(textured_program_num);
check_error();
glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, hsv_wheel_texnum);
+ check_error();
+ glUniform1i(glGetUniformLocation(textured_program_num, "tex"), 0); // Bind the 2D sampler.
+ check_error();
glEnable(GL_BLEND);
check_error();
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
check_error();
- // wheel
- glBegin(GL_QUADS);
-
- glTexCoord2f(0.0f, 1.0f);
- glVertex2f(0.0f, y);
-
- glTexCoord2f(1.0f, 1.0f);
- glVertex2f(0.2f * 9.0f / 16.0f, y);
+ GLuint vao;
+ glGenVertexArrays(1, &vao);
+ check_error();
+ glBindVertexArray(vao);
+ check_error();
- glTexCoord2f(1.0f, 0.0f);
- glVertex2f(0.2f * 9.0f / 16.0f, y + 0.2f);
+ // wheel
+ float wheel_vertices[] = {
+ 0.0f, y,
+ 0.0f, y + 0.2f,
+ 0.2f * 9.0f / 16.0f, y,
+ 0.2f * 9.0f / 16.0f, y + 0.2f,
+ };
+ float wheel_texcoords[] = {
+ 0.0f, 1.0f,
+ 0.0f, 0.0f,
+ 1.0f, 1.0f,
+ 1.0f, 0.0f,
+ };
+ GLuint position_vbo = fill_vertex_attribute(textured_program_num, "position", 2, GL_FLOAT, sizeof(wheel_vertices), wheel_vertices);
+ GLuint texcoord_vbo = fill_vertex_attribute(textured_program_num, "texcoord", 2, GL_FLOAT, sizeof(wheel_texcoords), wheel_texcoords);
+ check_error();
- glTexCoord2f(0.0f, 0.0f);
- glVertex2f(0.0f, y + 0.2f);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+ check_error();
- glEnd();
+ cleanup_vertex_attribute(textured_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(textured_program_num, "texcoord", texcoord_vbo);
// wheel selector
- glDisable(GL_TEXTURE_2D);
- glColor3f(0.0f, 0.0f, 0.0f);
- glPointSize(5.0f);
- glBegin(GL_POINTS);
- glVertex2f((0.1f + rad * cos(theta) * 0.1f) * 9.0f / 16.0f, y + 0.1f - rad * sin(theta) * 0.1f);
- glEnd();
-
- // value slider
- glDisable(GL_TEXTURE_2D);
- glBegin(GL_QUADS);
+ draw_black_point(
+ (0.1f + rad * cos(theta) * 0.1f) * 9.0f / 16.0f,
+ y + 0.1f - rad * sin(theta) * 0.1f,
+ 5.0f);
- glColor3f(0.0f, 0.0f, 0.0f);
- glVertex2f(0.22f * 9.0f / 16.0f, y);
- glVertex2f(0.24f * 9.0f / 16.0f, y);
-
- glColor3f(1.0f, 1.0f, 1.0f);
- glVertex2f(0.24f * 9.0f / 16.0f, y + 0.2f);
- glVertex2f(0.22f * 9.0f / 16.0f, y + 0.2f);
-
- glEnd();
+ // value slider
+ glUseProgram(colored_program_num);
+ float value_vertices[] = {
+ 0.22f * 9.0f / 16.0f, y,
+ 0.22f * 9.0f / 16.0f, y + 0.2f,
+ 0.24f * 9.0f / 16.0f, y,
+ 0.24f * 9.0f / 16.0f, y + 0.2f,
+ };
+ float value_colors[] = {
+ 0.0f, 0.0f, 0.0f,
+ 1.0f, 1.0f, 1.0f,
+ 0.0f, 0.0f, 0.0f,
+ 1.0f, 1.0f, 1.0f,
+ };
+ position_vbo = fill_vertex_attribute(colored_program_num, "position", 2, GL_FLOAT, sizeof(value_vertices), value_vertices);
+ GLuint color_vbo = fill_vertex_attribute(colored_program_num, "color", 3, GL_FLOAT, sizeof(value_colors), value_colors);
+ check_error();
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+ check_error();
+ cleanup_vertex_attribute(colored_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(colored_program_num, "color", color_vbo);
// value selector
- glColor3f(0.0f, 0.0f, 0.0f);
- glPointSize(5.0f);
- glBegin(GL_POINTS);
- glVertex2f(0.23f * 9.0f / 16.0f, y + value * 0.2f);
- glEnd();
+ draw_black_point(0.23f * 9.0f / 16.0f, y + value * 0.2f, 5.0f);
- glColor3f(1.0f, 1.0f, 1.0f);
+ glDeleteVertexArrays(1, &vao);
+ check_error();
+ glUseProgram(0);
+ check_error();
}
void draw_saturation_bar(float y, float saturation)
{
- glUseProgram(0);
+ GLuint vao;
+ glGenVertexArrays(1, &vao);
+ check_error();
+ glBindVertexArray(vao);
check_error();
// value slider
- glDisable(GL_TEXTURE_2D);
- glBegin(GL_QUADS);
-
- glColor3f(0.0f, 0.0f, 0.0f);
- glVertex2f(0.0f * 9.0f / 16.0f, y + 0.02f);
- glVertex2f(0.0f * 9.0f / 16.0f, y);
-
- glColor3f(1.0f, 1.0f, 1.0f);
- glVertex2f(0.2f * 9.0f / 16.0f, y);
- glVertex2f(0.2f * 9.0f / 16.0f, y + 0.02f);
-
- glEnd();
+ glUseProgram(colored_program_num);
+ float value_vertices[] = {
+ 0.0f * 9.0f / 16.0f, y + 0.02f,
+ 0.2f * 9.0f / 16.0f, y + 0.02f,
+ 0.0f * 9.0f / 16.0f, y,
+ 0.2f * 9.0f / 16.0f, y,
+ };
+ float value_colors[] = {
+ 0.0f, 0.0f, 0.0f,
+ 1.0f, 1.0f, 1.0f,
+ 0.0f, 0.0f, 0.0f,
+ 1.0f, 1.0f, 1.0f,
+ };
+ GLuint position_vbo = fill_vertex_attribute(colored_program_num, "position", 2, GL_FLOAT, sizeof(value_vertices), value_vertices);
+ GLuint color_vbo = fill_vertex_attribute(colored_program_num, "color", 3, GL_FLOAT, sizeof(value_colors), value_colors);
+ check_error();
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+ check_error();
+ cleanup_vertex_attribute(colored_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(colored_program_num, "color", color_vbo);
// value selector
- glColor3f(0.0f, 0.0f, 0.0f);
- glPointSize(5.0f);
- glBegin(GL_POINTS);
- glVertex2f(0.2f * saturation * 9.0f / 16.0f, y + 0.01f);
- glEnd();
+ draw_black_point(0.2f * saturation * 9.0f / 16.0f, y + 0.01f, 5.0f);
- glColor3f(1.0f, 1.0f, 1.0f);
+ glDeleteVertexArrays(1, &vao);
+ check_error();
+ glUseProgram(0);
+ check_error();
}
void make_hsv_wheel_texture()
{
- glGenTextures(1, &hsv_wheel_num);
+ glGenTextures(1, &hsv_wheel_texnum);
static unsigned char hsv_pix[HSV_WHEEL_SIZE * HSV_WHEEL_SIZE * 4];
for (int y = 0; y < HSV_WHEEL_SIZE; ++y) {
}
}
- glBindTexture(GL_TEXTURE_2D, hsv_wheel_num);
+ glBindTexture(GL_TEXTURE_2D, hsv_wheel_texnum);
check_error();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
check_error();
check_error();
}
+void init_hsv_resources()
+{
+ vector<string> frag_shader_outputs;
+ textured_program_num = resource_pool.compile_glsl_program(
+ read_version_dependent_file("vs", "vert"),
+ read_version_dependent_file("texture1d", "frag"),
+ frag_shader_outputs);
+ colored_program_num = resource_pool.compile_glsl_program(
+ read_version_dependent_file("vs-color", "vert"),
+ read_version_dependent_file("color", "frag"),
+ frag_shader_outputs);
+ make_hsv_wheel_texture();
+}
+
+void cleanup_hsv_resources()
+{
+ resource_pool.release_glsl_program(textured_program_num);
+ resource_pool.release_glsl_program(colored_program_num);
+}
+
void read_colorwheel(float xf, float yf, float *rad, float *theta, float *value)
{
if (xf < 0.2f && yf < 0.2f) {
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