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implement DHGR

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This commit is contained in:
Brad Grantham 2021-01-02 16:25:05 -08:00
parent 2e095b24f6
commit e55025e615
2 changed files with 176 additions and 5 deletions
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179
interface.cpp
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@ -167,6 +167,14 @@ GLuint hires_to_screen_location;
GLuint hires_x_offset_location;
GLuint hires_y_offset_location;
GLuint dhgr_program;
GLuint dhgr_texture_location;
GLuint dhgr_aux_texture_location;
GLuint dhgr_texture_coord_scale_location;
GLuint dhgr_to_screen_location;
GLuint dhgr_x_offset_location;
GLuint dhgr_y_offset_location;
GLuint hirescolor_program;
GLuint hirescolor_texture_location;
GLuint hirescolor_texture_coord_scale_location;
@ -175,6 +183,15 @@ GLuint hirescolor_to_screen_location;
GLuint hirescolor_x_offset_location;
GLuint hirescolor_y_offset_location;
GLuint dhgrcolor_program;
GLuint dhgrcolor_texture_location;
GLuint dhgrcolor_aux_texture_location;
GLuint dhgrcolor_texture_coord_scale_location;
GLuint dhgrcolor_artifact_colors_texture_location;
GLuint dhgrcolor_to_screen_location;
GLuint dhgrcolor_x_offset_location;
GLuint dhgrcolor_y_offset_location;
GLuint image_program;
GLuint image_texture_location;
GLuint image_texture_coord_scale_location;
@ -301,6 +318,87 @@ static const char *hirescolor_fragment_shader = R"(
color = texture(artifact_colors_texture, colorIndex/16.0 + .01f);
})";
static const char *dhgr_fragment_shader = R"(
in vec2 raster_coords;
uniform vec2 dhgr_texture_coord_scale;
uniform sampler2D dhgr_texture;
uniform sampler2D dhgr_aux_texture;
out vec4 color;
int get_bit(vec2 coords)
{
int byte = int(coords.x) / 14;
int page = (int(coords.x) / 7) % 2;
int bit = int(coords.x) % 7;
int texturex = byte * 8 + bit;
ivec2 tc = ivec2(texturex, raster_coords.y);
if(page == 0) {
return int(texture(dhgr_aux_texture, (tc + vec2(.01f, .01f)) * dhgr_texture_coord_scale).x);
} else {
return int(texture(dhgr_texture, (tc + vec2(.01f, .01f)) * dhgr_texture_coord_scale).x);
}
}
void main()
{
int bit = get_bit(raster_coords * vec2(2, 1));
if(bit == 1)
color = vec4(1, 1, 1, 1);
else
color = vec4(0, 0, 0, 1);
})";
static const char *dhgrcolor_fragment_shader = R"(
in vec2 raster_coords;
uniform vec2 dhgr_texture_coord_scale;
uniform sampler2D dhgr_texture;
uniform sampler2D dhgr_aux_texture;
uniform sampler1D artifact_colors_texture;
out vec4 color;
int get_bit(vec2 coords)
{
if(coords.x < 0)
return 0;
int byte = int(coords.x) / 14;
int page = (int(coords.x) / 7) % 2;
int bit = int(coords.x) % 7;
int texturex = byte * 8 + bit;
ivec2 tc = ivec2(texturex, raster_coords.y);
if(page == 0) {
return int(texture(dhgr_aux_texture, (tc + vec2(.01f, .01f)) * dhgr_texture_coord_scale).x);
} else {
return int(texture(dhgr_texture, (tc + vec2(.01f, .01f)) * dhgr_texture_coord_scale).x);
}
}
void main()
{
int colorIndex;
float actualX = raster_coords.x * 2;
int phase = int(actualX + 1) % 4;
int A = get_bit(raster_coords * vec2(2,1) + vec2( 0, 0));
int B = get_bit(raster_coords * vec2(2,1) + vec2(-1, 0));
int C = get_bit(raster_coords * vec2(2,1) + vec2(-2, 0));
int D = get_bit(raster_coords * vec2(2,1) + vec2(-3, 0));
if(phase == 0) {
colorIndex = D * 2 + C * 4 + B * 8 + A * 1; /* shown in screen order */
} else if(phase == 1) {
colorIndex = D * 4 + C * 8 + B * 1 + A * 2; /* shown in screen order */
} else if(phase == 2) {
colorIndex = D * 8 + C * 1 + B * 2 + A * 4; /* shown in screen order */
} else {
colorIndex = D * 1 + C * 2 + B * 4 + A * 8; /* shown in screen order */
}
color = texture(artifact_colors_texture, colorIndex/16.0 + .01f);
})";
static const char *text_vertex_shader = R"(
uniform mat3 to_screen;
in vec2 vertex_coords;
@ -466,7 +564,6 @@ void initialize_screen_areas()
}
}
void set_hires_shader(float to_screen[9], const opengl_texture& texture, bool color, float x, float y)
{
if(color) {
@ -502,6 +599,52 @@ void set_hires_shader(float to_screen[9], const opengl_texture& texture, bool co
}
}
void set_dhgr_shader(float to_screen[9], const opengl_texture& texture, const opengl_texture& aux_texture, bool color, float x, float y)
{
if(color) {
glUseProgram(dhgrcolor_program);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
glUniform1i(dhgrcolor_texture_location, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, aux_texture);
glUniform1i(dhgrcolor_aux_texture_location, 1);
glUniform2f(dhgrcolor_texture_coord_scale_location, 1.0 / texture.w, 1.0 / texture.h);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D, artifact_colors_texture);
glUniform1i(dhgrcolor_artifact_colors_texture_location, 2);
CheckOpenGL(__FILE__, __LINE__);
glUniformMatrix3fv(dhgrcolor_to_screen_location, 1, GL_FALSE, to_screen);
glUniform1f(dhgrcolor_x_offset_location, x);
glUniform1f(dhgrcolor_y_offset_location, y);
CheckOpenGL(__FILE__, __LINE__);
} else {
glUseProgram(dhgr_program);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
glUniform1i(dhgr_texture_location, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, aux_texture);
glUniform1i(dhgr_aux_texture_location, 1);
glUniform2f(dhgr_texture_coord_scale_location, 1.0 / texture.w, 1.0 / texture.h);
glUniformMatrix3fv(dhgr_to_screen_location, 1, GL_FALSE, to_screen);
glUniform1f(dhgr_x_offset_location, x);
glUniform1f(dhgr_y_offset_location, y);
CheckOpenGL(__FILE__, __LINE__);
}
}
void set_textport_shader(float to_screen[9], const opengl_texture& textport, int blink, float x, float y, float fg[4], float bg[4])
{
glUseProgram(text_program);
@ -562,7 +705,7 @@ void set_textport80_shader(float to_screen[9], const opengl_texture& textport80,
CheckOpenGL(__FILE__, __LINE__);
}
void set_shader(float to_screen[9], DisplayMode display_mode, bool mixed_mode, int display_page, bool vid80, int blink, float x, float y)
void set_shader(float to_screen[9], DisplayMode display_mode, bool mixed_mode, int display_page, bool vid80, bool dhgr, int blink, float x, float y)
{
if(mixed_mode || (display_mode == TEXT)) {
@ -593,7 +736,11 @@ void set_shader(float to_screen[9], DisplayMode display_mode, bool mixed_mode, i
} else if(display_mode == HIRES) {
set_hires_shader(to_screen, hires_texture[0][display_page], draw_using_color, x, y); // XXX should switch aux
if(dhgr) {
set_dhgr_shader(to_screen, hires_texture[0][display_page], hires_texture[1][0], draw_using_color, x, y);
} else {
set_hires_shader(to_screen, hires_texture[0][display_page], draw_using_color, x, y); // XXX should switch aux
}
}
}
@ -625,7 +772,7 @@ struct apple2screen : public widget
for(uint32_t i = 0; i < apple2_screen_height; i++) {
const ModeSettings& settings = line_to_mode[i];
set_shader(to_screen, settings.mode, (i < 160) ? false : settings.mixed, settings.page, settings.vid80, (elapsed_millis / 300) % 2, x, y);
set_shader(to_screen, settings.mode, (i < 160) ? false : settings.mixed, settings.page, settings.vid80, settings.dhgr, (elapsed_millis / 300) % 2, x, y);
CheckOpenGL(__FILE__, __LINE__);
line_to_area[i].bind();
@ -1078,6 +1225,30 @@ void initialize_gl(void)
hirescolor_x_offset_location = glGetUniformLocation(hirescolor_program, "x_offset");
hirescolor_y_offset_location = glGetUniformLocation(hirescolor_program, "y_offset");
dhgr_program = GenerateProgram("dhgr", hires_vertex_shader, dhgr_fragment_shader);
glBindAttribLocation(dhgr_program, raster_coords_attrib, "vertex_coords");
assert(dhgr_program != 0);
dhgr_texture_location = glGetUniformLocation(dhgr_program, "dhgr_texture");
dhgr_aux_texture_location = glGetUniformLocation(dhgr_program, "dhgr_aux_texture");
dhgr_texture_coord_scale_location = glGetUniformLocation(dhgr_program, "dhgr_texture_coord_scale");
dhgr_to_screen_location = glGetUniformLocation(dhgr_program, "to_screen");
dhgr_x_offset_location = glGetUniformLocation(dhgr_program, "x_offset");
dhgr_y_offset_location = glGetUniformLocation(dhgr_program, "y_offset");
dhgrcolor_program = GenerateProgram("dhgrcolor", hires_vertex_shader, dhgrcolor_fragment_shader);
glBindAttribLocation(dhgrcolor_program, raster_coords_attrib, "vertex_coords");
assert(dhgrcolor_program != 0);
dhgrcolor_texture_location = glGetUniformLocation(dhgrcolor_program, "dhgr_texture");
dhgrcolor_aux_texture_location = glGetUniformLocation(dhgrcolor_program, "dhgr_aux_texture");
dhgrcolor_texture_coord_scale_location = glGetUniformLocation(dhgrcolor_program, "dhgr_texture_coord_scale");
dhgrcolor_artifact_colors_texture_location = glGetUniformLocation(dhgrcolor_program, "artifact_colors_texture");
dhgrcolor_to_screen_location = glGetUniformLocation(dhgrcolor_program, "to_screen");
dhgrcolor_x_offset_location = glGetUniformLocation(dhgrcolor_program, "x_offset");
dhgrcolor_y_offset_location = glGetUniformLocation(dhgrcolor_program, "y_offset");
assert(dhgrcolor_texture_location != -1);
assert(dhgrcolor_aux_texture_location != -1);
assert(dhgrcolor_artifact_colors_texture_location != -1);
text_program = GenerateProgram("textport", text_vertex_shader, text_fragment_shader);
glBindAttribLocation(text_program, raster_coords_attrib, "vertex_coords");
assert(text_program != 0);

2
interface.h
View File

@ -72,7 +72,7 @@ struct ModeSettings
mixed(mixed_),
page(page_),
vid80(vid80_),
dhgr(false),
dhgr(dhgr),
altchar(altchar_)
{}
bool operator !=(const ModeSettings& ms)