# See the License for the specific language governing permissions and
# limitations under the License.
-# Simple API for 2D games, based around `Sprite` and `App::update`
+# Simple API for 2D games, built around `Sprite` and `App::update`
#
# Client programs should implement `App::update` to execute game logic and
# add instances of `Sprite` to `App::sprites` and `App::ui_sprites`.
# This system relies on two cameras `App::world_camera` and `App::ui_camera`.
#
# * `App::world_camera` applies a perspective effect to draw the game world.
-# This camera is designed to be moved around to see the world as well as to zoom in and out.
-# It is used to position the sprites in `App::sprites`.
+# This camera is designed to be moved around to see the world as well as to
+# zoom in and out. It is used to position the sprites in `App::sprites`.
#
# * `App::ui_camera` is a simple orthogonal camera to display UI objects.
-# This camera should mostly be still, it can still move for chock effects and the like.
-# It can be used to standardize the size of the UI across devices.
-# It is used to position the sprites in `App::ui_sprites`.
+# This camera should mostly be still, it can still move for chock effects
+# and the like. It can be used to standardize the size of the UI across
+# devices. It is used to position the sprites in `App::ui_sprites`.
#
# See the sample game at `contrib/asteronits/`.
module flat
import glesv2
-
-import geometry::points_and_lines
+intrude import geometry::points_and_lines # For _x, _y and _z
import matrix::projection
import more_collections
-import realtime
import performance_analysis
import gamnit
import android_two_fingers_motion is conditional(android)
-# Image to draw on screen
+# Draw a `texture` at `center`
+#
+# An instance of `Sprite` can only belong to a single `SpriteSet` at
+# a time. The on screen position depends on the camera associated
+# to the `SpriteSet`.
class Sprite
# Texture drawn to screen
- var texture: Texture is writable
+ var texture: Texture is writable(texture_direct=)
- # Position of this sprite in world coordinates
- var center: Point3d[Float] is writable
+ # Texture drawn to screen
+ fun texture=(value: Texture)
+ do
+ if isset _texture and value != texture then
+ needs_update
+ if value.root != texture.root then needs_remap
+ end
+ texture_direct = value
+ end
+
+ # Center position of this sprite in world coordinates
+ var center: Point3d[Float] is writable(center_direct=), noautoinit
+
+ # Center position of this sprite in world coordinates
+ fun center=(value: Point3d[Float]) is autoinit do
+ if isset _center and value != center then
+ needs_update
+ center.sprites_remove self
+ end
+
+ value.sprites_add self
+ center_direct = value
+ end
- # Rotation on the Z axis, where 0.0 points right and `0.5*pi` points up
- var rotation = 0.0 is writable
+ # Rotation on the Z axis, positive values go counterclockwise
+ var rotation = 0.0 is writable(rotation_direct=)
+
+ # Rotation on the Z axis, positive values go counterclockwise
+ fun rotation=(value: Float)
+ do
+ if isset _rotation and value != rotation then needs_update
+ rotation_direct = value
+ end
+
+ # Mirror `texture` horizontally, inverting each pixel on the X axis
+ var invert_x = false is writable(invert_x_direct=)
# Mirror `texture` horizontally, inverting each pixel on the X axis
- var invert_x = false is writable
+ fun invert_x=(value: Bool)
+ do
+ if isset _invert_x and value != invert_x then needs_update
+ invert_x_direct = value
+ end
# Scale applied to this sprite
- var scale = 1.0 is writable
+ #
+ # The default size of `self` depends on the size in pixels of `texture`.
+ var scale = 1.0 is writable(scale_direct=)
- # Transparency applied to the texture on draw
+ # Scale applied to this sprite, see `scale`
+ fun scale=(value: Float)
+ do
+ if isset _scale and value != scale then needs_update
+ scale_direct = value
+ end
+
+ # Transparency applied to `texture` on draw
fun alpha: Float do return tint[3]
- # Transparency applied to the texture on draw
- fun alpha=(value: Float) do tint[3] = value
+ # Transparency applied to `texture` on draw
+ fun alpha=(value: Float)
+ do
+ if isset _tint and value != alpha then needs_update
+ tint[3] = value
+ end
- # Tint applied to the texture on draw
+ # Tint applied to `texture` on draw
+ #
+ # Alternative to the accessors `red, green, blue & alpha`.
+ # Changes inside the array do not automatically set `needs_update`.
#
# Require: `tint.length == 4`
- var tint: Array[Float] = [1.0, 1.0, 1.0, 1.0] is writable
+ var tint: Array[Float] = [1.0, 1.0, 1.0, 1.0] is writable(tint_direct=)
- private fun draw
+ # Tint applied to `texture` on draw, see `tint`
+ fun tint=(value: Array[Float])
do
- var simple_2d_program = app.simple_2d_program
-
- glActiveTexture gl_TEXTURE0
- glBindTexture(gl_TEXTURE_2D, texture.root.gl_texture)
+ if isset _tint and value != tint then needs_update
+ tint_direct = value
+ end
- simple_2d_program.translation.array_enabled = false
- simple_2d_program.color.array_enabled = false
- simple_2d_program.scale.array_enabled = false
+ # Is this sprite static and added in bulk?
+ #
+ # Set to `true` to give a hint to the framework that this sprite won't
+ # change often and that it is added in bulk with other static sprites.
+ # This value can be ignored in the prototyping phase of a game and
+ # added only when better performance are needed.
+ var static = false is writable(static_direct=)
+
+ # Is this sprite static and added in bulk? see `static`
+ fun static=(value: Bool)
+ do
+ if isset _static and value != static then needs_remap
+ static_direct = value
+ end
- simple_2d_program.translation.uniform(center.x, center.y, center.z, 0.0)
- simple_2d_program.color.uniform(tint[0], tint[1], tint[2], tint[3])
- simple_2d_program.scale.uniform scale
+ # Request an update on the CPU
+ #
+ # This is called automatically on modification of any value of `Sprite`.
+ # However, it can still be set manually if a modification can't be
+ # detected or by subclasses.
+ fun needs_update
+ do
+ var c = context
+ if c != null then c.sprites_to_update.add self
+ end
- simple_2d_program.use_texture.uniform true
- simple_2d_program.texture.uniform 0
- simple_2d_program.tex_coord.array(
- if invert_x then
- texture.texture_coords_invert_x
- else texture.texture_coords, 2)
- simple_2d_program.coord.array(texture.vertices, 3)
+ # Request a resorting of this sprite in its sprite list
+ #
+ # Resorting is required when `static` or the root of `texture` changes.
+ # This is called automatically when such changes are detected.
+ # However, it can still be set manually if a modification can't be
+ # detected or by subclasses.
+ fun needs_remap
+ do
+ var l = sprite_set
+ if l != null then l.sprites_to_remap.add self
+ end
- simple_2d_program.rotation.uniform new Matrix.rotation(rotation, 0.0, 0.0, -1.0)
+ # Current context to which `self` was sorted
+ private var context: nullable SpriteContext = null
- glDrawArrays(gl_TRIANGLE_STRIP, 0, 4)
- end
+ # Current context to which `self` belongs
+ private var sprite_set: nullable SpriteSet = null
end
redef class App
# Default graphic program to draw `sprites`
- var simple_2d_program = new Simple2dProgram is lazy # TODO private
+ private var simple_2d_program = new Simple2dProgram is lazy
- # Camera for world objects with perspective
+ # Camera for world `sprites` and `depth::actors` with perspective
#
# By default, the camera is configured to respect the resolution
# of the screen in world coordinates at `z == 0.0`.
return camera
end
- # Camera for UI elements using an orthogonal view
+ # Camera for `ui_sprites` using an orthogonal view
var ui_camera: UICamera = new UICamera(app.display.as(not null)) is lazy
- # Live sprites to draw in reference to `world_camera`
- var sprites: Sequence[Sprite] = new List[Sprite]
+ # World sprites to draw as seen by `world_camera`
+ var sprites: Set[Sprite] = new SpriteSet
+
+ # UI sprites to draw as seen by `ui_camera`, drawn over world `sprites`
+ var ui_sprites: Set[Sprite] = new SpriteSet
- # UI sprites to draw in reference to `ui_camera`, over world `sprites`
- var ui_sprites: Sequence[Sprite] = new List[Sprite]
+ # Main method to refine in clients to update game logic and `sprites`
+ fun update(dt: Float) do end
+
+ # Display `texture` as a splash screen
+ #
+ # Load `texture` if needed and resets `ui_camera` to 1080 units on the Y axis.
+ fun show_splash_screen(texture: Texture)
+ do
+ texture.load
+
+ ui_camera.reset_height 1080.0
+
+ var splash = new Sprite(texture, ui_camera.center)
+ ui_sprites.add splash
+
+ var display = display
+ assert display != null
+ glClear gl_COLOR_BUFFER_BIT
+ frame_core_ui_sprites display
+ display.flip
+
+ ui_sprites.remove splash
+ end
+
+ # ---
+ # Support and implementation
# Main clock used to count each frame `dt`, lapsed for `update` only
private var clock = new Clock is lazy
# Performance clock to for `frame_core_draw` operations
private var perf_clock_main = new Clock
+
+ # Second performance clock for smaller operations
+ private var perf_clock_sprites = new Clock is lazy
+
redef fun on_create
do
super
assert display != null
var gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
+ assert gl_error == gl_NO_ERROR else print_error gl_error
# Prepare program
var program = simple_2d_program
glClearColor(0.0, 0.0, 0.0, 1.0)
gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
+ assert gl_error == gl_NO_ERROR else print_error gl_error
# Prepare to draw
for tex in all_root_textures do
end
end
+ redef fun on_stop
+ do
+ # Clean up
+ simple_2d_program.delete
+
+ # Close gamnit
+ var display = display
+ if display != null then display.close
+ end
+
redef fun frame_core(display)
do
# Prepare to draw, clear buffers
# Check errors
var gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
+ assert gl_error == gl_NO_ERROR else print_error gl_error
# Update game logic and set sprites
perf_clock_main.lapse
# Check errors
gl_error = glGetError
- assert gl_error == gl_NO_ERROR else print gl_error
+ assert gl_error == gl_NO_ERROR else print_error gl_error
end
# Draw the whole screen, all `glDraw...` calls should be executed here
perfs["gamnit flat ui_sprites"].add perf_clock_main.lapse
end
-
- # Draw world sprites from `sprites`
- protected fun frame_core_world_sprites(display: GamnitDisplay)
+ private fun frame_core_sprites(display: GamnitDisplay, sprite_set: SpriteSet, camera: Camera)
do
+ var simple_2d_program = app.simple_2d_program
simple_2d_program.use
+ simple_2d_program.mvp.uniform camera.mvp_matrix
- # Set constant configs
- simple_2d_program.coord.array_enabled = true
- simple_2d_program.tex_coord.array_enabled = true
- simple_2d_program.color.array_enabled = false
+ # draw
+ sprite_set.draw
+ end
- # TODO optimize this draw to store constant values on the GPU
- # World sprites
- simple_2d_program.mvp.uniform world_camera.mvp_matrix
- for sprite in sprites do sprite.draw
+ # Draw world sprites from `sprites`
+ protected fun frame_core_world_sprites(display: GamnitDisplay)
+ do
+ frame_core_sprites(display, sprites.as(SpriteSet), world_camera)
end
# Draw UI sprites from `ui_sprites`
protected fun frame_core_ui_sprites(display: GamnitDisplay)
do
- simple_2d_program.use
-
- # Set constant configs
- simple_2d_program.coord.array_enabled = true
- simple_2d_program.tex_coord.array_enabled = true
- simple_2d_program.color.array_enabled = false
-
# Reset only the depth buffer
glClear gl_DEPTH_BUFFER_BIT
- # UI sprites
- simple_2d_program.mvp.uniform ui_camera.mvp_matrix
- for sprite in ui_sprites do sprite.draw
- end
-
- # Main method to refine in clients to update game logic and `sprites`
- fun update(dt: Float) do end
-
- # Display `texture` as a splash screen
- #
- # Load `texture` if needed and resets `ui_camera` to 1080 units on the Y axis.
- fun show_splash_screen(texture: Texture)
- do
- texture.load
-
- ui_camera.reset_height 1080.0
-
- var splash = new Sprite(texture, ui_camera.center)
- ui_sprites.add splash
-
- var display = display
- assert display != null
- glClear gl_COLOR_BUFFER_BIT
- frame_core_ui_sprites display
- display.flip
-
- ui_sprites.remove splash
- end
-
- redef fun on_stop
- do
- # Clean up
- simple_2d_program.delete
-
- # Close gamnit
- var display = display
- if display != null then display.close
+ frame_core_sprites(display, ui_sprites.as(SpriteSet), ui_camera)
end
end
redef class Texture
# Vertices coordinates of the base geometry
+ #
+ # Defines the default width and height of related sprites.
private var vertices: Array[Float] is lazy do
- var mod = 1.0
- var w = width * mod
- var h = height * mod
- var a = [-0.5*w, -0.5*h, 0.0]
- var b = [ 0.5*w, -0.5*h, 0.0]
- var c = [-0.5*w, 0.5*h, 0.0]
- var d = [ 0.5*w, 0.5*h, 0.0]
-
- var vertices = new Array[Float]
- for v in [c, d, a, b] do vertices.add_all v
- return vertices
+ var w = width
+ var h = height
+ return [-0.5*w, 0.5*h, 0.0,
+ 0.5*w, 0.5*h, 0.0,
+ -0.5*w, -0.5*h, 0.0,
+ 0.5*w, -0.5*h, 0.0]
end
- # Coordinates of this texture on the `root` texture, with `[0..1.0]`
+ # Coordinates of this texture on the `root` texture, in `[0..1.0]`
private var texture_coords: Array[Float] is lazy do
- var a = [offset_left, offset_bottom]
- var b = [offset_right, offset_bottom]
- var c = [offset_left, offset_top]
- var d = [offset_right, offset_top]
-
- var texture_coords = new Array[Float]
- for v in [c, d, a, b] do texture_coords.add_all v
- return texture_coords
+ var l = offset_left
+ var r = offset_right
+ var b = offset_bottom
+ var t = offset_top
+ return [l, t,
+ r, t,
+ l, b,
+ r, b]
end
- # Coordinates of this texture on the `root` texture, with the X axis inverted
+ # Coordinates of this texture on the `root` texture, inverting the X axis
private var texture_coords_invert_x: Array[Float] is lazy do
- var a = [offset_left, offset_bottom]
- var b = [offset_right, offset_bottom]
- var c = [offset_left, offset_top]
- var d = [offset_right, offset_top]
-
- var texture_coords = new Array[Float]
- for v in [d, c, b, a] do texture_coords.add_all v
- return texture_coords
+ var l = offset_left
+ var r = offset_right
+ var b = offset_bottom
+ var t = offset_top
+ return [r, t,
+ l, t,
+ r, b,
+ l, b]
end
end
# Graphic program to display simple models with a texture, translation, rotation and scale
-class Simple2dProgram
+private class Simple2dProgram
super GamnitProgramFromSource
redef var vertex_shader_source = """
uniform mat4 mvp;
// Rotation matrix
- uniform mat4 rotation;
+ attribute vec4 rotation_row0;
+ attribute vec4 rotation_row1;
+ attribute vec4 rotation_row2;
+ attribute vec4 rotation_row3;
+
+ mat4 rotation()
+ {
+ return mat4(rotation_row0, rotation_row1, rotation_row2, rotation_row3);
+ }
- // Output for the fragment shader
+ // Output to the fragment shader
varying vec4 v_color;
varying vec2 v_coord;
void main()
{
+ gl_Position = (vec4(coord.xyz * scale, 1.0) * rotation() + translation)* mvp;
v_color = color;
- gl_Position = (vec4(coord.xyz * scale, 1.0) * rotation + translation) * mvp;
v_coord = tex_coord;
}
""" @ glsl_vertex_shader
{
if(use_texture) {
gl_FragColor = v_color * texture2D(texture0, v_coord);
- if (gl_FragColor.a == 0.0) discard;
+ if (gl_FragColor.a <= 0.1) discard;
} else {
gl_FragColor = v_color;
}
# Translation applied to each vertex
var translation = attributes["translation"].as(AttributeVec4) is lazy
- # Rotation matrix
- var rotation = uniforms["rotation"].as(UniformMat4) is lazy
+ # Rotation matrix, row 0
+ var rotation_row0 = attributes["rotation_row0"].as(AttributeVec4) is lazy
+
+ # Rotation matrix, row 1
+ var rotation_row1 = attributes["rotation_row1"].as(AttributeVec4) is lazy
+
+ # Rotation matrix, row 2
+ var rotation_row2 = attributes["rotation_row2"].as(AttributeVec4) is lazy
+
+ # Rotation matrix, row 3
+ var rotation_row3 = attributes["rotation_row3"].as(AttributeVec4) is lazy
# Scaling per vertex
var scale = attributes["scale"].as(AttributeFloat) is lazy
do
return new Point3d[Float](self.x.to_f+x.to_f, self.y.to_f+y.to_f, self.z.to_f+z.to_f)
end
+
+ # ---
+ # Associate each point to its sprites
+
+ private var sprites: nullable Array[Sprite] = null
+
+ private fun sprites_add(sprite: Sprite)
+ do
+ var sprites = sprites
+ if sprites == null then
+ sprites = new Array[Sprite]
+ self.sprites = sprites
+ end
+ sprites.add sprite
+ end
+
+ private fun sprites_remove(sprite: Sprite)
+ do
+ var sprites = sprites
+ assert sprites != null
+ sprites.remove sprite
+ end
+
+ # ---
+ # Notify `sprites` on attribute modification
+
+ private fun needs_update
+ do
+ var sprites = sprites
+ if sprites != null then for s in sprites do s.needs_update
+ end
+
+ redef fun x=(v)
+ do
+ if isset _x and v != x then needs_update
+ super
+ end
+
+ redef fun y=(v)
+ do
+ if isset _y and v != y then needs_update
+ super
+ end
+
+ redef fun z=(v)
+ do
+ if isset _z and v != z then needs_update
+ super
+ end
+end
+
+# Set of sprites sorting them into different `SpriteContext`
+private class SpriteSet
+ super HashSet[Sprite]
+
+ # Map texture then static vs dynamic to a `SpriteContext`
+ var contexts_map = new HashMap2[GamnitRootTexture, Bool, SpriteContext]
+
+ # Contexts in `contexts_map`
+ var contexts_items = new Array[SpriteContext]
+
+ # Sprites needing resorting in `contexts_map`
+ var sprites_to_remap = new Array[Sprite]
+
+ # Add a sprite to the appropriate context
+ fun map_sprite(sprite: Sprite)
+ do
+ assert sprite.context == null else print_error "Sprite {sprite} belongs to another SpriteSet"
+
+ var texture = sprite.texture.root
+ var context = contexts_map[texture, sprite.static]
+
+ if context == null then
+ var usage = if sprite.static then gl_STATIC_DRAW else gl_DYNAMIC_DRAW
+ context = new SpriteContext(texture, usage)
+
+ contexts_map[texture, sprite.static] = context
+ contexts_items.add context
+ end
+
+ context.sprites.add sprite
+ context.sprites_to_update.add sprite
+
+ sprite.context = context
+ sprite.sprite_set = self
+ end
+
+ # Remove a sprite from its context
+ fun unmap_sprite(sprite: Sprite)
+ do
+ var context = sprite.context
+ assert context != null
+ context.sprites.remove sprite
+
+ sprite.context = null
+ sprite.sprite_set = null
+ end
+
+ # Draw all sprites by all contexts
+ fun draw
+ do
+ for sprite in sprites_to_remap do
+ unmap_sprite sprite
+ map_sprite sprite
+ end
+ sprites_to_remap.clear
+
+ for context in contexts_items do context.draw
+ end
+
+ redef fun add(e)
+ do
+ map_sprite e
+ super
+ end
+
+ redef fun remove(e)
+ do
+ super
+ if e isa Sprite then unmap_sprite e
+ end
+
+ redef fun clear
+ do
+ super
+ for c in contexts_items do c.destroy
+ contexts_map.clear
+ contexts_items.clear
+ end
+end
+
+# Context for calls to `glDrawElements`
+#
+# Each context has only one `texture` and `usage`, but many sprites.
+private class SpriteContext
+
+ # ---
+ # Context config and state
+
+ # Only root texture drawn by this context
+ var texture: nullable GamnitRootTexture
+
+ # OpenGL ES usage of `buffer_array` and `buffer_element`
+ var usage: GLBufferUsage
+
+ # Sprites drawn by this context
+ var sprites = new GroupedArray[Sprite]
+
+ # Sprites to update since last `draw`
+ var sprites_to_update = new Set[Sprite]
+
+ # Sprites that have been update and for which `needs_update` can be set to false
+ var updated_sprites = new Array[Sprite]
+
+ # Buffer size to preallocate at `resize`, multiplied by `sprites.length`
+ #
+ # Require: `resize_ratio >= 1.0`
+ var resize_ratio = 1.2
+
+ # ---
+ # OpenGL ES data
+
+ # OpenGL ES buffer name for vertex data
+ var buffer_array: Int = -1
+
+ # OpenGL ES buffer name for indices
+ var buffer_element: Int = -1
+
+ # Current capacity, in sprites, of `buffer_array` and `buffer_element`
+ var buffer_capacity = 0
+
+ # C buffers used to pass the data of a single sprite
+ var local_data_buffer = new GLfloatArray(float_per_vertex*4) is lazy
+ var local_indices_buffer = new CUInt16Array(indices_per_sprite) is lazy
+
+ # ---
+ # Constants
+
+ # Number of GL_FLOAT per vertex of `Simple2dProgram`
+ var float_per_vertex: Int is lazy do
+ # vec4 translation, vec4 color, vec4 coord,
+ # float scale, vec2 tex_coord, vec4 rotation_row*
+ return 4 + 4 + 4 +
+ 1 + 2 + 4*4
+ end
+
+ # Number of bytes per vertex of `Simple2dProgram`
+ var bytes_per_vertex: Int is lazy do
+ var fs = 4 # sizeof(GL_FLOAT)
+ return fs * float_per_vertex
+ end
+
+ # Number of bytes per sprite
+ var bytes_per_sprite: Int is lazy do return bytes_per_vertex * 4
+
+ # Number of vertex indices per sprite draw call (2 triangles)
+ var indices_per_sprite = 6
+
+ # ---
+ # Main services
+
+ # Allocate `buffer_array` and `buffer_element`
+ fun prepare
+ do
+ var bufs = glGenBuffers(2)
+ buffer_array = bufs[0]
+ buffer_element = bufs[1]
+
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+
+ # Destroy `buffer_array` and `buffer_element`
+ fun destroy
+ do
+ glDeleteBuffers([buffer_array, buffer_element])
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ buffer_array = -1
+ buffer_element = -1
+ end
+
+ # Resize `buffer_array` and `buffer_element` to fit all `sprites` (and more)
+ fun resize
+ do
+ app.perf_clock_sprites.lapse
+
+ # Allocate a bit more space
+ var capacity = (sprites.capacity.to_f * resize_ratio).to_i
+
+ var array_bytes = capacity * bytes_per_sprite
+ glBindBuffer(gl_ARRAY_BUFFER, buffer_array)
+ assert glIsBuffer(buffer_array)
+ glBufferData(gl_ARRAY_BUFFER, array_bytes, new Pointer.nul, usage)
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ # GL_TRIANGLES 6 vertices * sprite
+ var n_indices = capacity * indices_per_sprite
+ var ius = 2 # sizeof(GL_UNSIGNED_SHORT)
+ var element_bytes = n_indices * ius
+ glBindBuffer(gl_ELEMENT_ARRAY_BUFFER, buffer_element)
+ assert glIsBuffer(buffer_element)
+ glBufferData(gl_ELEMENT_ARRAY_BUFFER, element_bytes, new Pointer.nul, usage)
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ buffer_capacity = capacity
+
+ sys.perfs["gamnit flat gpu resize"].add app.perf_clock_sprites.lapse
+ end
+
+ # Update GPU data of `sprite`
+ fun update_sprite(sprite: Sprite)
+ do
+ var sprite_index = sprites.index_of(sprite)
+ if sprite_index == -1 then return
+
+ # Vertices data
+
+ var data = local_data_buffer
+ var o = 0
+ for v in [0..4[ do
+ # vec4 translation
+ data[o+ 0] = sprite.center.x
+ data[o+ 1] = sprite.center.y
+ data[o+ 2] = sprite.center.z
+ data[o+ 3] = 0.0
+
+ # vec4 color
+ data[o+ 4] = sprite.tint[0]
+ data[o+ 5] = sprite.tint[1]
+ data[o+ 6] = sprite.tint[2]
+ data[o+ 7] = sprite.tint[3]
+
+ # float scale
+ data[o+ 8] = sprite.scale
+
+ # vec4 coord
+ data[o+ 9] = sprite.texture.vertices[v*3+0]
+ data[o+10] = sprite.texture.vertices[v*3+1]
+ data[o+11] = sprite.texture.vertices[v*3+2]
+ data[o+12] = 0.0
+
+ # vec2 tex_coord
+ var texture = texture
+ if texture != null then
+ var tc = if sprite.invert_x then
+ sprite.texture.texture_coords_invert_x
+ else sprite.texture.texture_coords
+ data[o+13] = tc[v*2+0]
+ data[o+14] = tc[v*2+1]
+ end
+
+ # mat4 rotation
+ var rot
+ if sprite.rotation == 0.0 then
+ # Cache the matrix at no rotation
+ rot = once new Matrix.identity(4)
+ else
+ rot = new Matrix.rotation(sprite.rotation, 0.0, 0.0, 1.0)
+ end
+ data.fill_from(rot.items, o+15)
+
+ o += float_per_vertex
+ end
+
+ glBindBuffer(gl_ARRAY_BUFFER, buffer_array)
+ glBufferSubData(gl_ARRAY_BUFFER, sprite_index*bytes_per_sprite, bytes_per_sprite, data.native_array)
+
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ # Element / indices
+ #
+ # 0--1
+ # | /|
+ # |/ |
+ # 2--3
+
+ var indices = local_indices_buffer
+ var io = sprite_index*4
+ indices[0] = io+0
+ indices[1] = io+2
+ indices[2] = io+1
+ indices[3] = io+1
+ indices[4] = io+2
+ indices[5] = io+3
+
+ glBindBuffer(gl_ELEMENT_ARRAY_BUFFER, buffer_element)
+ glBufferSubData(gl_ELEMENT_ARRAY_BUFFER, sprite_index*6*2, 6*2, indices.native_array)
+
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+
+ # Draw all `sprites`
+ #
+ # Call `resize` and `update_sprite` as needed before actual draw operation.
+ #
+ # Require: `app.simple_2d_program` and `mvp` must be bound on the GPU
+ fun draw
+ do
+ if buffer_array == -1 then prepare
+
+ assert buffer_array > 0 and buffer_element > 0 else
+ print_error "Internal error: {self} was destroyed"
+ end
+
+ # Setup
+ glBindBuffer(gl_ARRAY_BUFFER, buffer_array)
+ glBindBuffer(gl_ELEMENT_ARRAY_BUFFER, buffer_element)
+
+ # Resize GPU buffers?
+ if sprites.capacity > buffer_capacity then
+ # Try to defragment first
+ var moved = sprites.defragment
+
+ if sprites.capacity > buffer_capacity then
+ # Defragmentation wasn't enough, grow
+ resize
+
+ # We must update everything
+ for s in sprites.items do if s != null then sprites_to_update.add s
+ else
+ # Just update the moved sprites
+ for s in moved do sprites_to_update.add s
+ end
+ else if sprites.available.not_empty then
+ # Defragment a bit anyway
+ # TODO defrag only when there's time left on a frame
+ var moved = sprites.defragment(1)
+ for s in moved do sprites_to_update.add s
+ end
+
+ # Update GPU sprites data
+ if sprites_to_update.not_empty then
+ app.perf_clock_sprites.lapse
+
+ for sprite in sprites_to_update do update_sprite(sprite)
+ sprites_to_update.clear
+
+ sys.perfs["gamnit flat gpu update"].add app.perf_clock_sprites.lapse
+ end
+
+ # Update uniforms specific to this context
+ var texture = texture
+ app.simple_2d_program.use_texture.uniform texture != null
+ if texture != null then
+ glActiveTexture gl_TEXTURE0
+ glBindTexture(gl_TEXTURE_2D, texture.gl_texture)
+ app.simple_2d_program.texture.uniform 0
+ end
+ var gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ # Configure attributes, in order:
+ # vec4 translation, vec4 color, float scale, vec4 coord, vec2 tex_coord, vec4 rotation_row*
+ var offset = 0
+ var p = app.simple_2d_program
+ var sizeof_gl_float = 4 # sizeof(GL_FLOAT)
+
+ var size = 4 # Number of floats
+ glEnableVertexAttribArray p.translation.location
+ glVertexAttribPointeri(p.translation.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ size = 4
+ glEnableVertexAttribArray p.color.location
+ glVertexAttribPointeri(p.color.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ size = 1
+ glEnableVertexAttribArray p.scale.location
+ glVertexAttribPointeri(p.scale.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ size = 4
+ glEnableVertexAttribArray p.coord.location
+ glVertexAttribPointeri(p.coord.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ size = 2
+ glEnableVertexAttribArray p.tex_coord.location
+ glVertexAttribPointeri(p.tex_coord.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+
+ size = 4
+ for r in [p.rotation_row0, p.rotation_row1, p.rotation_row2, p.rotation_row3] do
+ if r.is_active then
+ glEnableVertexAttribArray r.location
+ glVertexAttribPointeri(r.location, size, gl_FLOAT, false, bytes_per_vertex, offset)
+ end
+ offset += size * sizeof_gl_float
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+
+ # Actual draw
+ for s in sprites.starts, e in sprites.ends do
+ var l = e-s
+ glDrawElementsi(gl_TRIANGLES, l*indices_per_sprite, gl_UNSIGNED_SHORT, 2*s*indices_per_sprite)
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+
+ # Take down
+ for attr in [p.translation, p.color, p.scale, p.coord, p.tex_coord,
+ p.rotation_row0, p.rotation_row1, p.rotation_row2, p.rotation_row3: Attribute] do
+ if not attr.is_active then continue
+ glDisableVertexAttribArray(attr.location)
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+
+ glBindBuffer(gl_ARRAY_BUFFER, 0)
+ glBindBuffer(gl_ELEMENT_ARRAY_BUFFER, 0)
+ gl_error = glGetError
+ assert gl_error == gl_NO_ERROR else print_error gl_error
+ end
+end
+
+# Representation of sprite data on the GPU
+#
+# The main purpose of this class is to optimize the use of contiguous
+# space in GPU memory. Each contiguous memory block can be drawn in a
+# single call. The starts index of each block is kept by `starts,
+# and the end + 1 by `ends`.
+#
+# The data can be compressed by a call to `defragment`.
+#
+# ~~~
+# var array = new GroupedArray[String]
+# assert array.to_s == ""
+#
+# array.add "a"
+# array.add "b"
+# array.add "c"
+# array.add "d"
+# array.add "e"
+# array.add "f"
+# assert array.to_s == "[a,b,c,d,e,f]"
+# assert array.capacity == 6
+#
+# array.remove "a"
+# assert array.to_s == "[b,c,d,e,f]"
+#
+# array.remove "b"
+# assert array.to_s == "[c,d,e,f]"
+#
+# array.remove "f"
+# assert array.to_s == "[c,d,e]"
+#
+# array.remove "d"
+# assert array.to_s == "[c][e]"
+#
+# array.add "A"
+# assert array.to_s == "[A][c][e]"
+#
+# array.add "B"
+# assert array.to_s == "[A,B,c][e]"
+#
+# array.remove "e"
+# assert array.to_s == "[A,B,c]"
+#
+# array.add "D"
+# assert array.to_s == "[A,B,c,D]"
+#
+# array.add "E"
+# assert array.to_s == "[A,B,c,D,E]"
+# assert array.capacity == 5
+# assert array.length == 5
+#
+# array.remove "A"
+# array.remove "B"
+# array.remove "c"
+# array.remove "D"
+# array.remove "E"
+# assert array.to_s == ""
+#
+# array.add "a"
+# assert array.to_s == "[a]"
+# ~~~
+private class GroupedArray[E]
+
+ # Memory with actual objects, and null in empty slots
+ var items = new Array[nullable E]
+
+ # Number of items in the array
+ var length = 0
+
+ # Number of item slots in the array
+ fun capacity: Int do return items.length
+
+ # Index of `item`
+ fun index_of(item: E): Int do return items.index_of(item)
+
+ # List of available slots
+ var available = new MinHeap[Int].default
+
+ # Start index of filled chunks
+ var starts = new List[Int]
+
+ # Index of the spots after filled chunks
+ var ends = new List[Int]
+
+ # Add `item` to the first available slot
+ fun add(item: E)
+ do
+ length += 1
+
+ if available.not_empty then
+ # starts & ends can't be empty
+
+ var i = available.take
+ items[i] = item
+
+ if i == starts.first - 1 then
+ # slot 0 free, 1 taken
+ starts.first -= 1
+ else if i == 0 then
+ # slot 0 and more free
+ starts.unshift 0
+ ends.unshift 1
+ else if starts.length >= 2 and ends.first + 1 == starts[1] then
+ # merge 2 chunks
+ ends.remove_at 0
+ starts.remove_at 1
+ else
+ # at end of first chunk
+ ends.first += 1
+ end
+ return
+ end
+
+ items.add item
+ if ends.is_empty then
+ starts.add 0
+ ends.add 1
+ else ends.last += 1
+ end
+
+ # Remove the first instance of `item`
+ fun remove(item: E)
+ do
+ var i = items.index_of(item)
+ assert i != -1
+ length -= 1
+ items[i] = null
+
+ var ii = 0
+ for s in starts, e in ends do
+ if s <= i and i < e then
+ if s == e-1 then
+ # single item chunk
+ starts.remove_at ii
+ ends.remove_at ii
+
+ if starts.is_empty then
+ items.clear
+ available.clear
+ return
+ end
+ else if e-1 == i then
+ # last item of chunk
+ ends[ii] -= 1
+
+ else if s == i then
+ # first item of chunk
+ starts[ii] += 1
+ else
+ # break up chunk
+ ends.insert(ends[ii], ii+1)
+ ends[ii] = i
+ starts.insert(i+1, ii+1)
+ end
+
+ available.add i
+ return
+ end
+ ii += 1
+ end
+
+ abort
+ end
+
+ # Defragment and compress everything into a single chunks beginning at 0
+ #
+ # Returns the elements that moved as a list.
+ #
+ # ~~~
+ # var array = new GroupedArray[String]
+ # array.add "a"
+ # array.add "b"
+ # array.add "c"
+ # array.add "d"
+ # array.remove "c"
+ # array.remove "a"
+ # assert array.to_s == "[b][d]"
+ #
+ # var moved = array.defragment
+ # assert moved.to_s == "[d]"
+ # assert array.to_s == "[d,b]"
+ # assert array.length == 2
+ # assert array.capacity == 2
+ #
+ # array.add "e"
+ # array.add "f"
+ # assert array.to_s == "[d,b,e,f]"
+ # ~~~
+ fun defragment(max: nullable Int): Array[E]
+ do
+ app.perf_clock_sprites.lapse
+ max = max or else length
+
+ var moved = new Array[E]
+ while max > 0 and (starts.length > 1 or starts.first != 0) do
+ var i = ends.last - 1
+ var e = items[i]
+ remove e
+ add e
+ moved.add e
+ max -= 1
+ end
+
+ if starts.length == 1 and starts.first == 0 then
+ for i in [length..capacity[ do items.pop
+ available.clear
+ end
+
+ sys.perfs["gamnit flat gpu defrag"].add app.perf_clock_sprites.lapse
+ return moved
+ end
+
+ redef fun to_s
+ do
+ var ss = new Array[String]
+ for s in starts, e in ends do
+ ss.add "["
+ for i in [s..e[ do
+ var item: nullable Object = items[i]
+ if item == null then item = "null"
+ ss.add item.to_s
+ if i != e-1 then ss.add ","
+ end
+ ss.add "]"
+ end
+ return ss.join
+ end
end
nitlanguage / nit.git / commitdiff