1 #ifndef _MOVIT_FLAT_INPUT_H
2 #define _MOVIT_FLAT_INPUT_H 1
9 #include "image_format.h"
13 // A FlatInput is the normal, “classic” case of an input, where everything
14 // comes from a single 2D array with chunky pixels.
15 class FlatInput : public Input {
17 FlatInput(ImageFormat format, MovitPixelFormat pixel_format, GLenum type, unsigned width, unsigned height);
20 virtual std::string effect_type_id() const { return "FlatInput"; }
22 // Create the texture itself. We cannot do this in the constructor,
23 // because we don't necessarily know all the settings (sRGB texture,
24 // mipmap generation) at that point.
27 virtual bool can_output_linear_gamma() const {
28 return (movit_srgb_textures_supported &&
29 type == GL_UNSIGNED_BYTE &&
30 (image_format.gamma_curve == GAMMA_LINEAR ||
31 image_format.gamma_curve == GAMMA_sRGB));
33 virtual AlphaHandling alpha_handling() const {
34 switch (pixel_format) {
35 case FORMAT_RGBA_PREMULTIPLIED_ALPHA:
36 case FORMAT_BGRA_PREMULTIPLIED_ALPHA:
37 return INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA;
38 case FORMAT_RGBA_POSTMULTIPLIED_ALPHA:
39 case FORMAT_BGRA_POSTMULTIPLIED_ALPHA:
40 return OUTPUT_POSTMULTIPLIED_ALPHA;
43 case FORMAT_GRAYSCALE:
44 return OUTPUT_BLANK_ALPHA;
50 std::string output_fragment_shader();
52 // Uploads the texture if it has changed since last time.
53 void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num);
55 unsigned get_width() const { return width; }
56 unsigned get_height() const { return height; }
57 Colorspace get_color_space() const { return image_format.color_space; }
58 GammaCurve get_gamma_curve() const { return image_format.gamma_curve; }
60 // Tells the input where to fetch the actual pixel data. Note that if you change
61 // this data, you must either call set_pixel_data() again (using the same pointer
62 // is fine), or invalidate_pixel_data(). Otherwise, the texture won't be re-uploaded
63 // on subsequent frames.
65 // The data can either be a regular pointer (if pbo==0), or a byte offset
66 // into a PBO. The latter will allow you to start uploading the texture data
67 // asynchronously to the GPU, if you have any CPU-intensive work between the
68 // call to set_pixel_data() and the actual rendering. In either case,
69 // the pointer (and PBO, if set) has to be valid at the time of the render call.
70 void set_pixel_data(const unsigned char *pixel_data, GLuint pbo = 0)
72 assert(this->type == GL_UNSIGNED_BYTE);
73 this->pixel_data = pixel_data;
75 invalidate_pixel_data();
78 void set_pixel_data(const float *pixel_data, GLuint pbo = 0)
80 assert(this->type == GL_FLOAT);
81 this->pixel_data = pixel_data;
83 invalidate_pixel_data();
86 void invalidate_pixel_data()
91 void set_pitch(unsigned pitch) {
97 ImageFormat image_format;
98 MovitPixelFormat pixel_format;
100 GLuint pbo, texture_num;
101 bool needs_update, finalized;
102 int output_linear_gamma, needs_mipmaps;
103 unsigned width, height, pitch;
104 const void *pixel_data;
107 #endif // !defined(_MOVIT_FLAT_INPUT_H)