Mercurial > hg > ascension / file comparison

comparison: src/text.c

src/text.c

changeset 29
1d001eb694dc
parent 26
139dac8ef9ee
child 32
86468a71dd73
equal deleted inserted replaced
28:8acde7d27904 29:1d001eb694dc
30 #include "ascension/error.h" 30 #include "ascension/error.h"
31 #include "ascension/shader.h" 31 #include "ascension/shader.h"
32 32
33 #include <GL/glew.h> 33 #include <GL/glew.h>
34 34
35 static void asc_text_draw(AscText const *node) {
36 if (node->color.alpha == 0 || node->hidden || node->internal.tex_id == 0) {
37 return;
38 }
39
40 glUseProgram(ASC_SHADER_FONT.base.id);
41
42 // Upload projection
43 // TODO: when we group UI draw calls, we don't need this
44 glUniformMatrix4fv(ASC_SHADER_FONT.base.projection, 1,
45 GL_FALSE, asc_context.active_window->projection);
46
47 // Upload model matrix
48 asc_mat4f model = {0};
49 model[asc_mat4_index(0, 0)] = node->internal.dimension.width;
50 model[asc_mat4_index(1, 1)] = node->internal.dimension.height;
51 model[asc_mat4_index(3, 0)] = node->position.x;
52 model[asc_mat4_index(3, 1)] = node->position.y;
53 model[asc_mat4_index(3, 3)] = 1;
54 glUniformMatrix4fv(ASC_SHADER_FONT.base.model, 1, GL_FALSE, model);
55
56 // Upload surface
57 glActiveTexture(GL_TEXTURE0);
58 glBindTexture(GL_TEXTURE_RECTANGLE, node->internal.tex_id);
59 glUniform1i(ASC_SHADER_FONT.surface, 0);
60
61 // Draw mesh
62 asc_primitives_draw_plane();
63 }
64
35 AscText *asc_text(int x, int y, char const *text) { 65 AscText *asc_text(int x, int y, char const *text) {
36 AscText *node = calloc(1, sizeof(AscText)); 66 AscText *node = calloc(1, sizeof(AscText));
37 if (node == NULL) { 67 if (node == NULL) {
38 asc_error("Out of memory."); 68 asc_error("Out of memory.");
39 return NULL; 69 return NULL;
40 } 70 }
71
72 node->node.free_func = (asc_scene_free_func) asc_text_free;
73 node->node.draw_func = (asc_scene_draw_func) asc_text_draw;
41 74
42 node->position = (asc_vec2i) {x, y}; 75 node->position = (asc_vec2i) {x, y};
43 node->font = asc_context.active_font; 76 node->font = asc_context.active_font;
44 node->color = asc_context.ink; 77 node->color = asc_context.ink;
45 if (text != NULL) { 78 if (text != NULL) {
91 124
92 // Free the surface 125 // Free the surface
93 SDL_FreeSurface(surface); 126 SDL_FreeSurface(surface);
94 } 127 }
95 128
96 void asc_text_draw(AscText const *node) {
97 if (node->color.alpha == 0 || node->hidden) {
98 return;
99 }
100
101 if (node->internal.tex_id == 0) {
102 asc_error("Tried to redraw text node after destruction");
103 return;
104 }
105
106 glUseProgram(ASC_SHADER_FONT.base.id);
107
108 // Upload projection
109 // TODO: when we group UI draw calls, we don't need this
110 glUniformMatrix4fv(ASC_SHADER_FONT.base.projection, 1,
111 GL_FALSE, asc_context.active_window->projection);
112
113 // Upload model matrix
114 asc_mat4f model = {0};
115 model[asc_mat4_index(0, 0)] = node->internal.dimension.width;
116 model[asc_mat4_index(1, 1)] = node->internal.dimension.height;
117 model[asc_mat4_index(3, 0)] = node->position.x;
118 model[asc_mat4_index(3, 1)] = node->position.y;
119 model[asc_mat4_index(3, 3)] = 1;
120 glUniformMatrix4fv(ASC_SHADER_FONT.base.model, 1, GL_FALSE, model);
121
122 // Upload surface
123 glActiveTexture(GL_TEXTURE0);
124 glBindTexture(GL_TEXTURE_RECTANGLE, node->internal.tex_id);
125 glUniform1i(ASC_SHADER_FONT.surface, 0);
126
127 // Draw mesh
128 asc_primitives_draw_plane();
129 }
130
131 void asc_text_free(AscText *node) { 129 void asc_text_free(AscText *node) {
132 asc_dprintf("Release text node texture: %u", node->internal.tex_id); 130 asc_dprintf("Release text node texture: %u", node->internal.tex_id);
133 glDeleteTextures(1, &node->internal.tex_id); 131 glDeleteTextures(1, &node->internal.tex_id);
134 free(node->text); 132 free(node->text);
135 free(node); 133 free(node);

Mercurial Repository: ascension

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