Method
CoglFramebufferdraw_multitextured_rectangle
Declaration [src]
void
cogl_framebuffer_draw_multitextured_rectangle (
CoglFramebuffer* framebuffer,
CoglPipeline* pipeline,
float x_1,
float y_1,
float x_2,
float y_2,
const float* tex_coords,
int tex_coords_len
)
Description [src]
Draws a textured rectangle to framebuffer with the given pipeline
state with the top left corner positioned at (x_1, y_1) and the
bottom right corner positioned at (x_2, y_2). As a pipeline may
contain multiple texture layers this interface lets you supply
texture coordinates for each layer of the pipeline.
This is a high level drawing api that can handle any kind of
CoglMetaTexture texture for the first layer such as
CoglTexture2DSliced textures which may internally be comprised of
multiple low-level textures. This is unlike low-level drawing apis
such as cogl_primitive_draw() which only support low level texture
types that are directly supported by GPUs such as CoglTexture2D.
CoglTexture2DSliced but all other layers much be low
level textures such as CoglTexture2D.
The top left texture coordinate for layer 0 of any pipeline will be (tex_coords[0], tex_coords[1]) and the bottom right coordinate will be (tex_coords[2], tex_coords[3]). The coordinates for layer 1 would be (tex_coords[4], tex_coords[5]) (tex_coords[6], tex_coords[7]) and so on…
The given texture coordinates should always be normalized such that (0, 0) corresponds to the top left and (1, 1) corresponds to the bottom right. To map an entire texture across the rectangle pass in tex_coords[0]=0, tex_coords[1]=0, tex_coords[2]=1, tex_coords[3]=1.
The first pair of coordinates are for the first layer (with the smallest layer index) and if you supply less texture coordinates than there are layers in the current source material then default texture coordinates (0.0, 0.0, 1.0, 1.0) are generated.
| Stability: | Unstable |
| Available since: | 1.10 |
Parameters
pipeline |
CoglPipeline |
A |
|
| The data is owned by the caller of the function. | |
x_1 |
float |
X coordinate upper left on screen. |
|
y_1 |
float |
Y coordinate upper left on screen. |
|
x_2 |
float |
X coordinate lower right on screen. |
|
y_2 |
float |
Y coordinate lower right on screen. |
|
tex_coords |
An array of float |
An array containing groups of 4 float values: [s_1, t_1, s_2, t_2] that are interpreted as two texture coordinates; one for the top left texel, and one for the bottom right texel. Each value should be between 0.0 and 1.0, where the coordinate (0.0, 0.0) represents the top left of the texture, and (1.0, 1.0) the bottom right. |
|
| The data is owned by the caller of the function. | |
tex_coords_len |
int |
The length of the |