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batch grid text and help overlay text

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Illusion
2023-11-30 18:25:44 +02:00
parent c1f8612da5
commit 9e25f16b5a
4 changed files with 80 additions and 20 deletions
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text.c
+59 -14
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@@ -18,21 +18,36 @@ Shader font_shader;
unsigned int font_vao;
unsigned int font_instance_vbo;
void extend_glyph_instance_list(GlyphInstanceList *dest, GlyphInstanceList *src) {
if (dest->size + src->size >= dest->capacity) {
dest->capacity = dest->size + src->size;
GlyphInstance* temp = realloc(dest->data, dest->capacity * sizeof(GlyphInstance));
if (!temp) {
printf("[FATAL] Failed to reallocate memory for glyph instance list\n");
exit(1);
}
dest->data = temp;
}
memcpy(dest->data + dest->size, src->data, src->size * sizeof(GlyphInstance));
dest->size += src->size;
}
void new_glyph_instance_list(GlyphInstanceList *list, uint capacity) {
list->size = 0;
list->capacity = capacity;
list->data = malloc(list->capacity * sizeof(TextInstance));
list->data = malloc(list->capacity * sizeof(GlyphInstance));
}
void clear_glyph_instance_list(GlyphInstanceList *list) {
list->size = 0;
memset(list->data, 0, list->size * sizeof(TextInstance));
memset(list->data, 0, list->size * sizeof(GlyphInstance));
}
void add_glyph_instance(GlyphInstanceList *list, TextInstance instance) {
void add_glyph_instance(GlyphInstanceList *list, GlyphInstance instance) {
if (list->size >= list->capacity) {
list->capacity *= 2;
TextInstance* temp = realloc(list->data, list->capacity * sizeof(TextInstance));
GlyphInstance* temp = realloc(list->data, list->capacity * sizeof(GlyphInstance));
if (!temp) {
printf("[FATAL] Failed to reallocate memory for glyph instance list\n");
exit(1);
@@ -201,22 +216,22 @@ int init_fonts(const char *font_path) {
// font instance vbo
glBindBuffer(GL_ARRAY_BUFFER, font_instance_vbo);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)0);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)0);
glVertexAttribDivisor(1, 1);
glEnableVertexAttribArray(2);
glVertexAttribIPointer(2, 1, GL_INT, sizeof(TextInstance), (void *)sizeof(Vec4f));
glVertexAttribIPointer(2, 1, GL_INT, sizeof(GlyphInstance), (void *)sizeof(Vec4f));
glVertexAttribDivisor(2, 1);
glEnableVertexAttribArray(3);
glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)(sizeof(Vec4f) + sizeof(int)));
glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)(sizeof(Vec4f) + sizeof(int)));
glVertexAttribDivisor(3, 1);
glEnableVertexAttribArray(4);
glEnableVertexAttribArray(5);
glEnableVertexAttribArray(6);
glEnableVertexAttribArray(7);
glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)(sizeof(Vec4f) * 2 + sizeof(int)));
glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)(sizeof(Vec4f) * 3 + sizeof(int)));
glVertexAttribPointer(6, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)(sizeof(Vec4f) * 4 + sizeof(int)));
glVertexAttribPointer(7, 4, GL_FLOAT, GL_FALSE, sizeof(TextInstance), (void *)(sizeof(Vec4f) * 5 + sizeof(int)));
glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)(sizeof(Vec4f) * 2 + sizeof(int)));
glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)(sizeof(Vec4f) * 3 + sizeof(int)));
glVertexAttribPointer(6, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)(sizeof(Vec4f) * 4 + sizeof(int)));
glVertexAttribPointer(7, 4, GL_FLOAT, GL_FALSE, sizeof(GlyphInstance), (void *)(sizeof(Vec4f) * 5 + sizeof(int)));
glVertexAttribDivisor(4, 1);
glVertexAttribDivisor(5, 1);
glVertexAttribDivisor(6, 1);
@@ -281,7 +296,7 @@ Sizef calculate_text_size(const char *text, int font_size) {
return size;
}
void draw_text(const char* text, int font_size, UIConstraints constraints, const Color *color, Alignment alignment) {
GlyphInstanceList get_glyph_instance_list_from_text(const char *text, int font_size, UIConstraints constraints, const Color *color, Alignment alignment) {
use_shader(font_shader);
Color text_color = { 0, 0, 0, 1.f };
if (color) {
@@ -333,7 +348,7 @@ void draw_text(const char* text, int font_size, UIConstraints constraints, const
float xpos = (x + (ch.bearing.width - first_char_bearing_w));
float ypos = (text_size.height - ch.bearing.height - (text_size.height - max_bearing_h));
TextInstance instance = {
GlyphInstance instance = {
.position = (Vec4f){xpos, ypos, ch.size.width, ch.size.height},
.tex_coords_index = (int)text[c] - 32,
.color = text_color,
@@ -348,12 +363,18 @@ void draw_text(const char* text, int font_size, UIConstraints constraints, const
c++;
}
return glyph_instance_list;
}
void draw_text(const char* text, int font_size, UIConstraints constraints, const Color *color, Alignment alignment) {
GlyphInstanceList glyph_instance_list = get_glyph_instance_list_from_text(text, font_size, constraints, color, alignment);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, zephr_context.font.atlas_texture_id);
glBindVertexArray(font_vao);
glBindBuffer(GL_ARRAY_BUFFER, font_instance_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(TextInstance) * glyph_instance_list.size, glyph_instance_list.data, GL_DYNAMIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, sizeof(GlyphInstance) * glyph_instance_list.size, glyph_instance_list.data, GL_DYNAMIC_DRAW);
glDrawElementsInstanced(GL_TRIANGLES, 6, GL_UNSIGNED_INT, NULL, glyph_instance_list.size);
@@ -362,3 +383,27 @@ void draw_text(const char* text, int font_size, UIConstraints constraints, const
free(glyph_instance_list.data);
}
void draw_text_batch(GlyphInstanceList *batch) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, zephr_context.font.atlas_texture_id);
glBindVertexArray(font_vao);
glBindBuffer(GL_ARRAY_BUFFER, font_instance_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(GlyphInstance) * batch->size, batch->data, GL_DYNAMIC_DRAW);
glDrawElementsInstanced(GL_TRIANGLES, 6, GL_UNSIGNED_INT, NULL, batch->size);
glBindVertexArray(0);
glBindTexture(GL_TEXTURE_2D, 0);
free(batch->data);
}
void add_text_instance(GlyphInstanceList *batch, const char* text, int font_size, UIConstraints constraints, const Color *color, Alignment alignment) {
GlyphInstanceList glyph_instance_list = get_glyph_instance_list_from_text(text, font_size, constraints, color, alignment);
extend_glyph_instance_list(batch, &glyph_instance_list);
free(glyph_instance_list.data);
}