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Loading TTF file with stb_truetype. Broke setup API slightly. Font baked, packed with space for custom data. Embeds compressed ProggyClean.

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ocornut
2015-01-08 23:35:01 +00:00
parent dd8a7655f5
commit b3a208901a
19 changed files with 3953 additions and 5249 deletions
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53
examples/opengl3_example/main.cpp
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@@ -8,9 +8,7 @@
#endif
#include "../../imgui.h"
#define STB_IMAGE_STATIC
#define STB_IMAGE_IMPLEMENTATION
#include "../shared/stb_image.h" // stb_image.h for PNG loading
#include <stdio.h>
// Glfw/Glew
#define GLEW_STATIC
@@ -24,7 +22,7 @@ static bool mousePressed[2] = { false, false };
// Shader variables
static int shader_handle, vert_handle, frag_handle;
static int texture_location, ortho_location;
static int texture_location, proj_mtx_location;
static int position_location, uv_location, colour_location;
static size_t vbo_max_size = 20000;
static unsigned int vbo_handle, vao_handle;
@@ -62,7 +60,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
};
glUseProgram(shader_handle);
glUniform1i(texture_location, 0);
glUniformMatrix4fv(ortho_location, 1, GL_FALSE, &ortho_projection[0][0]);
glUniformMatrix4fv(proj_mtx_location, 1, GL_FALSE, &ortho_projection[0][0]);
// Grow our buffer according to what we need
size_t total_vtx_count = 0;
@@ -184,28 +182,29 @@ void InitGL()
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ortho;\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Colour;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Colour;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Colour = Colour;\n"
" gl_Position = ortho*vec4(Position.xy,0,1);\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Colour;\n"
"out vec4 FragColor;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" FragColor = Frag_Colour * texture( Texture, Frag_UV.st);\n"
" Out_Color = Frag_Color;\n"
" Out_Color.w *= texture( Texture, Frag_UV.st).x;\n"
"}\n";
shader_handle = glCreateProgram();
@@ -220,10 +219,10 @@ void InitGL()
glLinkProgram(shader_handle);
texture_location = glGetUniformLocation(shader_handle, "Texture");
ortho_location = glGetUniformLocation(shader_handle, "ortho");
proj_mtx_location = glGetUniformLocation(shader_handle, "ProjMtx");
position_location = glGetAttribLocation(shader_handle, "Position");
uv_location = glGetAttribLocation(shader_handle, "UV");
colour_location = glGetAttribLocation(shader_handle, "Colour");
colour_location = glGetAttribLocation(shader_handle, "Color");
glGenBuffers(1, &vbo_handle);
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
@@ -270,18 +269,20 @@ void InitImGui()
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
// Load font texture
// Load font
io.Font = new ImFont();
io.Font->LoadDefault();
//io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault());
//io.Font->DisplayOffset.y += 0.0f;
IM_ASSERT(io.Font->IsLoaded());
// Copy font texture
glGenTextures(1, &fontTex);
glBindTexture(GL_TEXTURE_2D, fontTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
const void* png_data;
unsigned int png_size;
ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
int tex_x, tex_y, tex_comp;
void* tex_data = stbi_load_from_memory((const unsigned char*)png_data, (int)png_size, &tex_x, &tex_y, &tex_comp, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_x, tex_y, 0, GL_RGBA, GL_UNSIGNED_BYTE, tex_data);
stbi_image_free(tex_data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
IM_ASSERT(io.Font->IsLoaded());
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, io.Font->TexWidth, io.Font->TexHeight, 0, GL_RED, GL_UNSIGNED_BYTE, io.Font->TexPixels);
}
void UpdateImGui()
@@ -364,7 +365,7 @@ int main(int argc, char** argv)
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window)
{
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
ImGui::ShowTestWindow(&show_test_window);
}