-#ifndef _FLAT_INPUT_H
-#define _FLAT_INPUT_H 1
+#ifndef _MOVIT_FLAT_INPUT_H
+#define _MOVIT_FLAT_INPUT_H 1
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <string>
+
+#include "effect.h"
+#include "effect_chain.h"
+#include "fp16.h"
+#include "image_format.h"
#include "input.h"
+namespace movit {
+
+class ResourcePool;
+
// A FlatInput is the normal, “classic” case of an input, where everything
// comes from a single 2D array with chunky pixels.
class FlatInput : public Input {
public:
- FlatInput(ImageFormat format, MovitPixelFormat pixel_format, unsigned width, unsigned height);
+ FlatInput(ImageFormat format, MovitPixelFormat pixel_format, GLenum type, unsigned width, unsigned height);
+ ~FlatInput();
virtual std::string effect_type_id() const { return "FlatInput"; }
- // Create the texture itself. We cannot do this in the constructor,
- // because we don't necessarily know all the settings (sRGB texture,
- // mipmap generation) at that point.
- void finalize();
-
- // TODO: Check that we actually have the required extension.
- virtual bool can_output_linear_gamma() const { return true; }
+ virtual bool can_output_linear_gamma() const {
+ // On desktop OpenGL, there's also GL_SLUMINANCE8 which could give us
+ // support for single-channel sRGB decoding, but it's not supported
+ // on GLES, and we're already actively rewriting single-channel inputs
+ // to GL_RED (even on desktop), so we stick to 3- and 4-channel inputs.
+ return (type == GL_UNSIGNED_BYTE &&
+ (pixel_format == FORMAT_RGB ||
+ pixel_format == FORMAT_RGBA_POSTMULTIPLIED_ALPHA) &&
+ (image_format.gamma_curve == GAMMA_LINEAR ||
+ image_format.gamma_curve == GAMMA_sRGB));
+ }
+ virtual AlphaHandling alpha_handling() const {
+ switch (pixel_format) {
+ case FORMAT_RGBA_PREMULTIPLIED_ALPHA:
+ return INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA;
+ case FORMAT_RGBA_POSTMULTIPLIED_ALPHA:
+ return OUTPUT_POSTMULTIPLIED_ALPHA;
+ case FORMAT_R:
+ case FORMAT_RG:
+ case FORMAT_RGB:
+ return OUTPUT_BLANK_ALPHA;
+ default:
+ assert(false);
+ }
+ }
std::string output_fragment_shader();
// Uploads the texture if it has changed since last time.
void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num);
- ColorSpace get_color_space() const { return image_format.color_space; }
+ unsigned get_width() const { return width; }
+ unsigned get_height() const { return height; }
+ Colorspace get_color_space() const { return image_format.color_space; }
GammaCurve get_gamma_curve() const { return image_format.gamma_curve; }
+ virtual bool is_single_texture() const { return true; }
// Tells the input where to fetch the actual pixel data. Note that if you change
// this data, you must either call set_pixel_data() again (using the same pointer
// is fine), or invalidate_pixel_data(). Otherwise, the texture won't be re-uploaded
// on subsequent frames.
- void set_pixel_data(const unsigned char *pixel_data)
+ //
+ // The data can either be a regular pointer (if pbo==0), or a byte offset
+ // into a PBO. The latter will allow you to start uploading the texture data
+ // asynchronously to the GPU, if you have any CPU-intensive work between the
+ // call to set_pixel_data() and the actual rendering. In either case,
+ // the pointer (and PBO, if set) has to be valid at the time of the render call.
+ void set_pixel_data(const unsigned char *pixel_data, GLuint pbo = 0)
+ {
+ assert(this->type == GL_UNSIGNED_BYTE);
+ this->pixel_data = pixel_data;
+ this->pbo = pbo;
+ invalidate_pixel_data();
+ }
+
+ void set_pixel_data(const unsigned short *pixel_data, GLuint pbo = 0)
{
+ assert(this->type == GL_UNSIGNED_SHORT);
this->pixel_data = pixel_data;
+ this->pbo = pbo;
invalidate_pixel_data();
}
- void invalidate_pixel_data()
+ void set_pixel_data_fp16(const fp16_int_t *pixel_data, GLuint pbo = 0)
{
- needs_update = true;
+ assert(this->type == GL_HALF_FLOAT);
+ this->pixel_data = pixel_data;
+ this->pbo = pbo;
+ invalidate_pixel_data();
}
- const unsigned char *get_pixel_data() const
+ void set_pixel_data(const float *pixel_data, GLuint pbo = 0)
{
- return pixel_data;
+ assert(this->type == GL_FLOAT);
+ this->pixel_data = pixel_data;
+ this->pbo = pbo;
+ invalidate_pixel_data();
+ }
+
+ void invalidate_pixel_data();
+
+ // Note: Sets pitch to width, so even if your pitch is unchanged,
+ // you will need to re-set it after this call.
+ void set_width(unsigned width)
+ {
+ assert(width != 0);
+ this->pitch = this->width = width;
+ invalidate_pixel_data();
+ }
+
+ void set_height(unsigned height)
+ {
+ assert(height != 0);
+ this->height = height;
+ invalidate_pixel_data();
}
void set_pitch(unsigned pitch) {
- assert(!finalized);
+ assert(pitch != 0);
this->pitch = pitch;
+ invalidate_pixel_data();
}
- unsigned get_pitch() {
- return pitch;
+ // Tells the input to use the specific OpenGL texture as pixel data.
+ // This is useful if you want to share the same texture between multiple
+ // EffectChain instances, or if you somehow can get the data into a texture more
+ // efficiently than through a normal upload (e.g. a video codec decoding straight
+ // into a texture). Note that you are responsible for setting the right sampler
+ // parameters (e.g. clamp-to-edge) yourself, as well as generate any mipmaps
+ // if they are needed.
+ //
+ // NOTE: The input does not take ownership of this texture; you are responsible
+ // for releasing it yourself. In particular, if you call invalidate_pixel_data()
+ // or anything calling it, the texture will silently be removed from the input.
+ //
+ // NOTE: Doing this in a situation where can_output_linear_gamma() is true
+ // can yield unexpected results, as the downstream effect can expect the texture
+ // to be uploaded with the sRGB flag on.
+ void set_texture_num(GLuint texture_num)
+ {
+ possibly_release_texture();
+ this->texture_num = texture_num;
+ this->owns_texture = false;
+ }
+
+ virtual void inform_added(EffectChain *chain)
+ {
+ resource_pool = chain->get_resource_pool();
}
private:
+ // Release the texture if we have any, and it is owned by us.
+ void possibly_release_texture();
+
ImageFormat image_format;
MovitPixelFormat pixel_format;
- GLenum format;
+ GLenum type;
GLuint pbo, texture_num;
- bool needs_update, finalized;
int output_linear_gamma, needs_mipmaps;
- unsigned width, height, pitch, bytes_per_pixel;
- const unsigned char *pixel_data;
+ unsigned width, height, pitch;
+ bool owns_texture;
+ const void *pixel_data;
+ ResourcePool *resource_pool;
+ bool fixup_swap_rb, fixup_red_to_grayscale;
+ GLint uniform_tex;
};
-#endif // !defined(_FLAT_INPUT_H)
+} // namespace movit
+
+#endif // !defined(_MOVIT_FLAT_INPUT_H)
projects / movit / blobdiff