[WIP] Try to enable alpha blending

graphics/shaders/shader.frag

@@ -6,12 +6,16 @@
 
 layout(set = 1, binding = 1) uniform sampler2D texSampler[];
 
-layout(location = 0) in vec3 fragColor;
+layout(location = 0) in vec4 fragColor;
 layout(location = 1) in vec2 fragTexCoord;
 layout(location = 2) in flat uint instanceTextureId;
 
 layout(location = 0) out vec4 outColor;
 
 void main() {
-    outColor = vec4(fragColor * texture(texSampler[instanceTextureId], fragTexCoord).rgb, 1.0);
+    /* vec4 sampled = vec4(1.0, 1.0, 1.0, texture(texSampler[instanceTextureId], fragTexCoord).r);*/
+    /* if (sampled.a < 0.1)
+        discard;
+    outColor = sampled; */
+    outColor = fragColor * texture(texSampler[instanceTextureId], fragTexCoord).r;
 }

graphics/shaders/shader.vert

@@ -7,7 +7,7 @@ layout(binding = 0) uniform UniformBufferObject {
 } ubo;
 
 layout(location = 0) in vec3 inPosition;
-layout(location = 1) in vec3 inColor;
+layout(location = 1) in vec4 inColor;
 layout(location = 2) in vec2 inTexCoord;
 
 layout(location = 3) in vec3 instancePosition;
@@ -15,7 +15,7 @@ layout(location = 4) in vec3 instanceRotation;
 layout(location = 5) in float instanceScale;
 layout(location = 6) in uint instanceTextureId;
 
-layout(location = 0) out vec3 fragColor;
+layout(location = 0) out vec4 fragColor;
 layout(location = 1) out vec2 fragTexCoord;
 layout(location = 2) out uint outInstanceTextureId;
 

graphics/src/rse_graphics.c

@@ -44,18 +44,18 @@ void rse_graphics_test_function(void)
         return;
     }
     rse_fonts_initialize();
-    rse_fonts_load_from_file("/usr/share/fonts/TTF/JetBrainsMonoNerdFont-Medium.ttf");
+    rse_fonts_load_from_file("/usr/share/fonts/JetBrainsMonoNerdFont/JetBrainsMonoNerdFont-Medium.ttf");
 
     // FIXME: Temporary array of vertices, for testing purposes
-    struct rse_vertex_t vertices[] = {{{-0.5f, -0.5f, 0.0f}, {1.0f, 0.0f, 0.0f}, {0.0f, 0.0f}},
-                                    {{0.5f, -0.5f, 0.0f}, {0.0f, 1.0f, 0.0f}, {1.0f, 0.0f}},
-                                    {{0.5f, 0.5f, 0.0f}, {0.0f, 0.0f, 1.0f}, {1.0f, 1.0f}},
-                                    {{-0.5f, 0.5f, 0.0f}, {1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}}};
+    struct rse_vertex_t vertices[] = {{{-0.5f, -0.5f, 0.0f}, {1.0f, 0.0f, 0.0f, 1.0f}, {0.0f, 0.0f}},
+                                    {{0.5f, -0.5f, 0.0f}, {0.0f, 1.0f, 0.0f, 1.0f}, {1.0f, 0.0f}},
+                                    {{0.5f, 0.5f, 0.0f}, {0.0f, 0.0f, 1.0f, 1.0f}, {1.0f, 1.0f}},
+                                    {{-0.5f, 0.5f, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}}};
 
-    struct rse_vertex_t vertices2[] = {{{-0.5f, -0.5f, -0.5f}, {1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}},
-                                    {{0.5f, -0.5f, -0.5f}, {1.0f, 1.0f, 1.0f}, {1.0f, 0.0f}},
-                                    {{0.5f, 0.5f, -0.5f}, {1.0f, 1.0f, 1.0f}, {1.0f, 1.0f}},
-                                    {{-0.5f, 0.5f, -0.5f}, {1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}}};
+    struct rse_vertex_t vertices2[] = {{{-0.5f, -0.5f, -0.5f}, {1.0f, 1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}},
+                                    {{0.5f, -0.5f, -0.5f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 0.0f}},
+                                    {{0.5f, 0.5f, -0.5f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 1.0f}},
+                                    {{-0.5f, 0.5f, -0.5f}, {1.0f, 1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}}};
 
     // FIXME: Temporary array of vertices, for testing purposes
     uint16_t indices[] = {0, 1, 2, 2, 3, 0};
@@ -83,7 +83,7 @@ void rse_graphics_test_function(void)
         tex_id_2
     });
 
-    rse_print_text("Hello World!", (struct vec3_t){-1.0f, 1.0f, 0.0f}, 0.3f);
+    rse_print_text("Hello World!", (struct vec3_t){-1.0f, 0.0f, 0.0f}, 0.3f);
 }
 
 rse_err_t rse_graphics_run(void)

graphics/src/rse_math.h

@@ -22,6 +22,17 @@ struct vec3_t {
     float z;
 };
 
+/**
+ * @brief 4 points vector, useful for colors with alpha channel
+ *
+ */
+struct vec4_t {
+    float x;
+    float y;
+    float z;
+    float w;
+};
+
 /* 4x4 matrix.
  * [x_1 | x_2 | x_3 | x_4]
  * [y_1 | y_2 | y_3 | y_4]

graphics/src/rse_text_renderer.c

@@ -98,16 +98,16 @@ rse_err_t rse_fonts_load_from_file(const char* file_path)
         }
 
         font_vertices[0] = (struct rse_vertex_t) {
-            {g_fonts_data[iter].bearing_x, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}
+            {g_fonts_data[iter].bearing_x, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}
         };
         font_vertices[1] = (struct rse_vertex_t) {
-            {g_fonts_data[iter].bearing_x + g_fonts_data[iter].width, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f}, {1.0f, 0.0f}
+            {g_fonts_data[iter].bearing_x + g_fonts_data[iter].width, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 0.0f}
         };
         font_vertices[2] = (struct rse_vertex_t) {
-            {g_fonts_data[iter].bearing_x + g_fonts_data[iter].width, g_fonts_data[iter].height, 0.0f}, {1.0f, 1.0f, 1.0f}, {1.0f, 1.0f}
+            {g_fonts_data[iter].bearing_x + g_fonts_data[iter].width, g_fonts_data[iter].height, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {1.0f, 1.0f}
         };
         font_vertices[3] = (struct rse_vertex_t) {
-            {g_fonts_data[iter].bearing_x, g_fonts_data[iter].height, 0.0f}, {1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}
+            {g_fonts_data[iter].bearing_x, g_fonts_data[iter].height, 0.0f}, {1.0f, 1.0f, 1.0f, 1.0f}, {0.0f, 1.0f}
         };
 
         g_fonts_data[iter].mesh_id = create_mesh(font_vertices, font_indices, 8, 6);

graphics/src/vulkan_buffers.c

@@ -259,7 +259,7 @@ rse_err_t rse_add_vertices(uint16_t mesh_id,
     index_data->buffer_offset = index_buffer->allocated_size;
     index_buffer->allocated_size += indices_size;
 
-    vmaDestroyBuffer(g_vulkan_state.allocator, staging_buffer.buffer, staging_buffer.allocation);
+    destroy_buffer(&staging_buffer);
 
     draw_indirect_command.indexCount = vertex_data->count;
     draw_indirect_command.instanceCount = 0;
@@ -295,7 +295,7 @@ rse_err_t update_mesh_instances(uint16_t mesh_id, struct rse_instance_data_t* in
                instance_size,
                instance_buffer->allocated_size);
 
-    vmaDestroyBuffer(g_vulkan_state.allocator, staging_buffer.buffer, staging_buffer.allocation);
+    destroy_buffer(&staging_buffer);
 
     instance_buffer->allocated_size += instance_size;
 

graphics/src/vulkan_commons.h

@@ -29,7 +29,7 @@ extern struct rse_vulkan_state_t g_vulkan_state;
 struct rse_vertex_t
 {
     struct vec3_t pos;
-    struct vec3_t color;
+    struct vec4_t color;
     struct vec3_t tex_coords;
 };
 

graphics/src/vulkan_pipeline.c

@@ -57,7 +57,7 @@ static VkVertexInputAttributeDescription* get_attribute_descriptions()
 
     attribute_descriptions[1].binding = 0;
     attribute_descriptions[1].location = 1; /* inColor in shader.vert */
-    attribute_descriptions[1].format = VK_FORMAT_R32G32B32_SFLOAT;
+    attribute_descriptions[1].format = VK_FORMAT_R32G32B32A32_SFLOAT;
     attribute_descriptions[1].offset = offsetof(struct rse_vertex_t, color);
 
     attribute_descriptions[2].binding = 0;
@@ -640,7 +640,7 @@ static void fill_color_blend_state_info(VkPipelineColorBlendStateCreateInfo* col
     color_blending->sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
     color_blending->pNext = NULL;
     color_blending->flags = 0U;
-    color_blending->logicOpEnable = VK_TRUE;
+    color_blending->logicOpEnable = VK_FALSE;
     color_blending->logicOp = VK_LOGIC_OP_COPY;
     color_blending->attachmentCount = 1U;
     color_blending->pAttachments = color_blend_attachment;