comparison: src/2d.c
src/2d.c
- changeset 151
- 42960d0c879b
- parent 143
- 4db4f00493ad
equal
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replaced
| 150:3045f61bc4eb | 151:42960d0c879b |
|---|---|
| 25 * POSSIBILITY OF SUCH DAMAGE. | 25 * POSSIBILITY OF SUCH DAMAGE. |
| 26 */ | 26 */ |
| 27 | 27 |
| 28 #include "ascension/2d.h" | 28 #include "ascension/2d.h" |
| 29 | 29 |
| 30 #include "ascension/constants.h" | |
| 31 #include "ascension/context.h" | |
| 32 #include "ascension/error.h" | |
| 33 #include "ascension/shader.h" | |
| 34 | |
| 35 #include <GL/glew.h> | |
| 36 | |
| 37 typedef struct asc_rectangle_shader_s { | |
| 38 AscShaderProgram program; | |
| 39 GLint color; | |
| 40 GLint size; | |
| 41 GLint thickness; | |
| 42 } AscRectangleShader; | |
| 43 | |
| 44 static void *asc_rectangle_shader_create(bool fill) { | |
| 45 AscShaderCodes codes; | |
| 46 if (asc_shader_load_code_files((AscShaderCodeInfo){ | |
| 47 .files.vtx = "sprite_vtx.glsl", | |
| 48 .files.frag = "rectangle_frag.glsl", | |
| 49 .defines.frag = fill ? "#define FILL" : NULL, | |
| 50 }, &codes)) { | |
| 51 asc_error("Loading sprite shader failed."); | |
| 52 return NULL; | |
| 53 } | |
| 54 AscRectangleShader *shader = asc_shader_create(codes, sizeof(*shader)); | |
| 55 if (asc_has_error()) { | |
| 56 asc_shader_free_codes(codes); | |
| 57 return NULL; | |
| 58 } | |
| 59 shader->color = glGetUniformLocation(shader->program.gl_id, "color"); | |
| 60 shader->size = glGetUniformLocation(shader->program.gl_id, "size"); | |
| 61 if (fill) { | |
| 62 shader->thickness = -1; | |
| 63 } else { | |
| 64 shader->thickness = glGetUniformLocation(shader->program.gl_id, "thickness"); | |
| 65 } | |
| 66 asc_shader_free_codes(codes); | |
| 67 | |
| 68 asc_error_catch_all_gl(); | |
| 69 | |
| 70 return shader; | |
| 71 } | |
| 72 | |
| 73 static AscShaderProgram *asc_rectangle_shader_fill_create() { | |
| 74 return asc_rectangle_shader_create(true); | |
| 75 } | |
| 76 | |
| 77 static AscShaderProgram *asc_rectangle_shader_draw_create() { | |
| 78 return asc_rectangle_shader_create(false); | |
| 79 } | |
| 80 | |
| 81 static const AscRectangleShader *asc_rectangle_shader_draw(void) { | |
| 82 return asc_shader_lookup_or_create(ASC_SHADER_RECTANGLE_DRAW, asc_rectangle_shader_draw_create); | |
| 83 } | |
| 84 | |
| 85 static const AscRectangleShader *asc_rectangle_shader_fill(void) { | |
| 86 return asc_shader_lookup_or_create(ASC_SHADER_RECTANGLE_FILL, asc_rectangle_shader_fill_create); | |
| 87 } | |
| 88 | |
| 89 static void asc_rectangle_destroy(AscSceneNode *node) { | |
| 90 asc_ptr_cast(AscRectangle, rectangle, node); | |
| 91 asc_mesh_destroy(&rectangle->mesh); | |
| 92 } | |
| 93 | |
| 94 static void asc_rectangle_update(AscSceneNode *node) { | |
| 95 asc_ptr_cast(AscRectangle, rectangle, node); | |
| 96 asc_vec2f size = asc_vec2f_new(rectangle->width, rectangle->height); | |
| 97 asc_mesh_plane_2d(&rectangle->mesh, .size = size, .uv_scale = size); | |
| 98 } | |
| 99 | |
| 100 static void asc_rectangle_draw(const AscCamera *camera, const AscSceneNode *node) { | |
| 101 asc_ptr_cast(AscRectangle, rectangle, node); | |
| 102 bool filled = asc_test_flag(rectangle->flags, ASC_RECTANGLE_FILLED); | |
| 103 | |
| 104 // Activate shader | |
| 105 // TODO: scene should know which shader we are going to activate s.t. it can pre-sort nodes | |
| 106 const AscRectangleShader *shader = filled | |
| 107 ? asc_rectangle_shader_fill() | |
| 108 : asc_rectangle_shader_draw(); | |
| 109 asc_shader_use(&shader->program, camera); | |
| 110 | |
| 111 // Upload uniforms | |
| 112 // TODO: uploading model matrix could be a helper function | |
| 113 glUniformMatrix4fv(shader->program.model, 1, | |
| 114 GL_FALSE, node->world_transform); | |
| 115 | |
| 116 glUniform4f(shader->color, | |
| 117 rectangle->color.red, | |
| 118 rectangle->color.green, | |
| 119 rectangle->color.blue, | |
| 120 rectangle->color.alpha | |
| 121 ); | |
| 122 glUniform2f(shader->size, (float) rectangle->width, (float) rectangle->height); | |
| 123 | |
| 124 if (!filled) { | |
| 125 // TODO: implement thickness | |
| 126 glUniform1f(shader->thickness, 1); | |
| 127 } | |
| 128 | |
| 129 // Draw mesh | |
| 130 asc_mesh_draw_triangle_strip(&rectangle->mesh); | |
| 131 } | |
| 132 | |
| 133 AscSceneNode *asc_rectangle_create(struct asc_rectangle_create_args args) { | |
| 134 AscRectangle *rectangle = cxZallocDefault(sizeof(AscRectangle)); | |
| 135 | |
| 136 if (args.bounds.size.width + args.bounds.size.height > 0) { | |
| 137 rectangle->node.position.x = (float) args.bounds.pos.x; | |
| 138 rectangle->node.position.y = (float) args.bounds.pos.y; | |
| 139 rectangle->width = args.bounds.size.width; | |
| 140 rectangle->height = args.bounds.size.height; | |
| 141 } else { | |
| 142 rectangle->node.position.x = (float) args.x; | |
| 143 rectangle->node.position.y = (float) args.y; | |
| 144 rectangle->width = args.width; | |
| 145 rectangle->height = args.height; | |
| 146 } | |
| 147 | |
| 148 rectangle->color = asc_col_itof(asc_context.ink); | |
| 149 | |
| 150 if (args.filled) { | |
| 151 asc_set_flag(rectangle->flags, ASC_RECTANGLE_FILLED); | |
| 152 } | |
| 153 | |
| 154 AscSceneNode *node = &rectangle->node; | |
| 155 node->position.z = ASC_SCENE_2D_DEPTH_OFFSET; | |
| 156 node->scale = asc_vec3f_one; | |
| 157 node->render_group = asc_context.ink.alpha < 255 | |
| 158 ? ASC_RENDER_GROUP_2D_BLEND | |
| 159 : ASC_RENDER_GROUP_2D_OPAQUE; | |
| 160 node->update_func = asc_rectangle_update; | |
| 161 node->destroy_func = asc_rectangle_destroy; | |
| 162 node->draw_func = asc_rectangle_draw; | |
| 163 asc_node_update(node); | |
| 164 return node; | |
| 165 } |
